Bagaimana mengkonversi ganda ke int dalam javascript

Saat Anda memprogram, Anda sering perlu beralih di antara tipe data. Misalnya, Anda mungkin perlu mengonversi string menjadi angka

Kemampuan untuk mengonversi satu tipe data ke tipe lainnya memberi Anda fleksibilitas tinggi saat bekerja dengan informasi

JavaScript memiliki metode bawaan yang berbeda untuk mengonversi atau memasukkan string menjadi angka

Pada artikel ini, Anda akan mempelajari beberapa metode JavaScript bawaan yang tersedia untuk mengonversi string menjadi angka, beserta pengantar (atau penyegar. ) ke dasar-dasar cara kerja string dan angka dalam JavaScript

Inilah yang akan kami bahas

Apa itu String dalam JavaScript?

String adalah cara yang efektif untuk berkomunikasi melalui teks, seperti menyimpan dan memanipulasi teks. Mereka adalah salah satu tipe data paling mendasar di semua bahasa pemrograman

String dalam JavaScript adalah tipe data primitif. Ini berarti bahwa mereka dibangun ke dalam bahasa secara default

String adalah urutan terurut dari nol atau lebih nilai karakter. Secara khusus, itu adalah urutan satu atau lebih karakter yang dapat berupa huruf, angka, atau simbol (seperti tanda baca)

Umumnya, Anda dapat mengetahui apakah nilai data adalah string jika diapit tanda kutip, seperti tanda kutip tunggal atau ganda

Secara khusus, ada tiga cara untuk membuat string dalam JavaScript

• Dengan menggunakan tanda kutip tunggal
• Dengan menggunakan tanda kutip ganda
• Dengan menggunakan backtick

Berikut adalah cara membuat string menggunakan tanda kutip tunggal

// string created using single quotes ('')
let favePhrase = 'Hello World!';

Berikut adalah cara membuat string menggunakan tanda kutip ganda

// string created using double quotes ("")
let favePhrase = "Hello World!";

Dan inilah cara membuat string menggunakan backticks

// string created using backticks (``)
let favePhrase = `Hello World!`;

Cara terakhir membuat string dalam JavaScript juga dikenal sebagai template literal

Apa itu Angka dalam JavaScript?

Angka memungkinkan Anda merepresentasikan nilai numerik dan melakukan operasi dan perhitungan matematika

Angka dalam JavaScript adalah tipe data primitif – sama seperti string

Tidak seperti bahasa pemrograman lainnya, Anda tidak perlu menentukan jenis angka yang ingin Anda buat. Misalnya, Anda tidak perlu menyebutkan apakah angka tersebut bilangan bulat atau pelampung

Dalam JavaScript, ada beberapa jenis angka (baik positif maupun negatif) yang dibangun ke dalam bahasa

• Bilangan bulat. Bilangan bulat adalah nilai numerik yang tidak menyertakan bagian desimal - juga dikenal sebagai bilangan bulat atau bilangan bulat
• Mengapung. Pelampung adalah angka dengan desimal dan setidaknya satu angka mengikuti titik desimal
• Bilangan eksponensial adalah bilangan yang dapat berupa bilangan bulat atau mengambang dan diikuti oleh

  // this is a string not a number!
  let num = '7';
  

  0.

  // this is a string not a number!
  let num = '7';
  

  _0 menunjukkan mengalikan angka dengan

  // this is a string not a number!
  let num = '7';
  

  2 pangkat tertentu
• Bilangan biner (juga dikenal sebagai bilangan basis 2). Biner adalah sistem numerik yang hanya terdiri dari dua angka.

  // this is a string not a number!
  let num = '7';
  

  3 dan

  // integer
  let num = 47;
  
  // float
  let num = 47.32;
  
  // exponential - to represent large numbers
  let num = 477e2;  // equal to multiplying 477 to 10 to the power of 2 (or 100) which results in 47700
  
  // exponential - to represent small numbers
  let num = 477e-2;  // equal to dividing 477 to 10 to the power of 2 (or 100) which results in 4.77
  
  // binary
  let num = 0b1111;    // stands for 15
  
  // octal
  let num = 023; // stands for 19
  
  // hexadecimal
  let num = 0xFF; // stands for 255
  

  8. Ini menggunakan 8 bit untuk mewakili satu byte. Angka dimulai dengan

  // this is a string not a number!
  let num = '7';
  

  _3 diikuti dengan

  // this is a string not a number!
  let num = '7';
  

  6 diikuti dengan angka 8-bit
• Bilangan oktal (juga dikenal sebagai bilangan berbasis 8). Bilangan oktal dimulai dengan

  // this is a string not a number!
  let num = '7';
  

  3 diikuti dengan digit oktal yang berkisar dari

  // this is a string not a number!
  let num = '7';
  

  8
• Bilangan heksadesimal (juga dikenal sebagai bilangan berbasis 16). Angka heksadesimal dimulai dengan

  // this is a string not a number!
  let num = '7';
  

  3 diikuti oleh

  let num = '7';
  console.log(typeof num)
  
  // string
  

  0 atau

  let num = '7';
  console.log(typeof num)
  
  // string
  

  1. Setelah itu, bisa ada kombinasi digit heksadesimal mulai dari

  let num = '7';
  console.log(typeof num)
  
  // string
  

  2 dan huruf mulai dari

  let num = '7';
  console.log(typeof num)
  
  // string
  

  3 (atau

  let num = '7';
  console.log(typeof num)
  
  // string
  

  4). Huruf

  let num = '7';
  console.log(typeof num)
  
  // string
  

  _3 dikaitkan dengan nilai

  let num = '7';
  console.log(typeof num)
  
  // string
  

  6

// integer
let num = 47;

// float
let num = 47.32;

// exponential - to represent large numbers
let num = 477e2;  // equal to multiplying 477 to 10 to the power of 2 (or 100) which results in 47700

// exponential - to represent small numbers
let num = 477e-2;  // equal to dividing 477 to 10 to the power of 2 (or 100) which results in 4.77

// binary
let num = 0b1111;    // stands for 15

// octal
let num = 023; // stands for 19

// hexadecimal
let num = 0xFF; // stands for 255

Sesuatu yang harus diperhatikan adalah bahwa angka tidak boleh diapit oleh tanda kutip - yang secara otomatis akan menjadikannya string

// this is a string not a number!
let num = '7';

Bagaimana Cara Memeriksa Tipe Data Nilai dalam JavaScript?

Untuk menghindari kesalahan dan memeriksa ulang tipe data dari suatu nilai dalam JavaScript, gunakan operator

let num = '7';
console.log(typeof num)

// string

Sebelumnya saya sebutkan bahwa angka yang diapit tanda kutip adalah string

Anda dapat memeriksanya sendiri dengan melakukan hal berikut

let num = '7';
console.log(typeof num)

// string

Cara Mengonversi String menjadi Angka Menggunakan Fungsi // integer let num = 47; // float let num = 47.32; // exponential - to represent large numbers let num = 477e2; // equal to multiplying 477 to 10 to the power of 2 (or 100) which results in 47700 // exponential - to represent small numbers let num = 477e-2; // equal to dividing 477 to 10 to the power of 2 (or 100) which results in 4.77 // binary let num = 0b1111; // stands for 15 // octal let num = 023; // stands for 19 // hexadecimal let num = 0xFF; // stands for 255 4

Sintaks umum untuk fungsi

// integer
let num = 47;

// float
let num = 47.32;

// exponential - to represent large numbers
let num = 477e2;  // equal to multiplying 477 to 10 to the power of 2 (or 100) which results in 47700

// exponential - to represent small numbers
let num = 477e-2;  // equal to dividing 477 to 10 to the power of 2 (or 100) which results in 4.77

// binary
let num = 0b1111;    // stands for 15

// octal
let num = 023; // stands for 19

// hexadecimal
let num = 0xFF; // stands for 255

parseInt(string, radix)

Fungsi

// integer
let num = 47;

// float
let num = 47.32;

// exponential - to represent large numbers
let num = 477e2;  // equal to multiplying 477 to 10 to the power of 2 (or 100) which results in 47700

// exponential - to represent small numbers
let num = 477e-2;  // equal to dividing 477 to 10 to the power of 2 (or 100) which results in 4.77

// binary
let num = 0b1111;    // stands for 15

// octal
let num = 023; // stands for 19

// hexadecimal
let num = 0xFF; // stands for 255

String adalah nilai yang perlu diubah menjadi angka

Radix menentukan sistem angka matematika yang ingin Anda gunakan dan basis angka yang akan dikembalikan – apakah angka tersebut akan menjadi basis 2 (atau biner), basis 8 (atau oktal), basis 10 (desimal), atau basis

Jika radix tidak disertakan, maka

// this is a string not a number!
let num = '7';

let num = '7';

let strToNum = parseInt(num, 10);

console.log(strToNum);
console.log(typeof strToNum);

// 7
// number

Bagaimana jika string berisi huruf dan angka?

let num = '7 cats 7';

let strToNum = parseInt(num, 10);

console.log(strToNum);
console.log(typeof strToNum);

// 7
// number

Ketika

// integer
let num = 47;

// float
let num = 47.32;

// exponential - to represent large numbers
let num = 477e2;  // equal to multiplying 477 to 10 to the power of 2 (or 100) which results in 47700

// exponential - to represent small numbers
let num = 477e-2;  // equal to dividing 477 to 10 to the power of 2 (or 100) which results in 4.77

// binary
let num = 0b1111;    // stands for 15

// octal
let num = 023; // stands for 19

// hexadecimal
let num = 0xFF; // stands for 255

Sesuatu yang perlu diingat adalah bahwa jika string tidak dimulai dengan angka, maka

parseInt(string, radix)

parseInt(string, radix)

let num = 'h7';

let strToNum = parseInt(num, 10);

console.log(strToNum);

// NaN

Fungsi

// integer
let num = 47;

// float
let num = 47.32;

// exponential - to represent large numbers
let num = 477e2;  // equal to multiplying 477 to 10 to the power of 2 (or 100) which results in 47700

// exponential - to represent small numbers
let num = 477e-2;  // equal to dividing 477 to 10 to the power of 2 (or 100) which results in 4.77

// binary
let num = 0b1111;    // stands for 15

// octal
let num = 023; // stands for 19

// hexadecimal
let num = 0xFF; // stands for 255

// this is a string not a number!
let num = '7';

parseInt(string, radix)

Bagaimana jika Anda memiliki string yang berisi pelampung?

// string created using double quotes ("")
let favePhrase = "Hello World!";

Jika demikian dan Anda ingin melakukan konversi literal, sebaiknya gunakan fungsi

// integer
let num = 47;

// float
let num = 47.32;

// exponential - to represent large numbers
let num = 477e2;  // equal to multiplying 477 to 10 to the power of 2 (or 100) which results in 47700

// exponential - to represent small numbers
let num = 477e-2;  // equal to dividing 477 to 10 to the power of 2 (or 100) which results in 4.77

// binary
let num = 0b1111;    // stands for 15

// octal
let num = 023; // stands for 19

// hexadecimal
let num = 0xFF; // stands for 255

Cara Mengonversi String menjadi Angka Menggunakan Fungsi // integer let num = 47; // float let num = 47.32; // exponential - to represent large numbers let num = 477e2; // equal to multiplying 477 to 10 to the power of 2 (or 100) which results in 47700 // exponential - to represent small numbers let num = 477e-2; // equal to dividing 477 to 10 to the power of 2 (or 100) which results in 4.77 // binary let num = 0b1111; // stands for 15 // octal let num = 023; // stands for 19 // hexadecimal let num = 0xFF; // stands for 255 5

Sintaks umum untuk fungsi

// integer
let num = 47;

// float
let num = 47.32;

// exponential - to represent large numbers
let num = 477e2;  // equal to multiplying 477 to 10 to the power of 2 (or 100) which results in 47700

// exponential - to represent small numbers
let num = 477e-2;  // equal to dividing 477 to 10 to the power of 2 (or 100) which results in 4.77

// binary
let num = 0b1111;    // stands for 15

// octal
let num = 023; // stands for 19

// hexadecimal
let num = 0xFF; // stands for 255

// string created using double quotes ("")
let favePhrase = "Hello World!";

Sintaks dan perilaku fungsi

// integer
let num = 47;

// float
let num = 47.32;

// exponential - to represent large numbers
let num = 477e2;  // equal to multiplying 477 to 10 to the power of 2 (or 100) which results in 47700

// exponential - to represent small numbers
let num = 477e-2;  // equal to dividing 477 to 10 to the power of 2 (or 100) which results in 4.77

// binary
let num = 0b1111;    // stands for 15

// octal
let num = 023; // stands for 19

// hexadecimal
let num = 0xFF; // stands for 255

// integer
let num = 47;

// float
let num = 47.32;

// exponential - to represent large numbers
let num = 477e2;  // equal to multiplying 477 to 10 to the power of 2 (or 100) which results in 47700

// exponential - to represent small numbers
let num = 477e-2;  // equal to dividing 477 to 10 to the power of 2 (or 100) which results in 4.77

// binary
let num = 0b1111;    // stands for 15

// octal
let num = 023; // stands for 19

// hexadecimal
let num = 0xFF; // stands for 255

// integer
let num = 47;

// float
let num = 47.32;

// exponential - to represent large numbers
let num = 477e2;  // equal to multiplying 477 to 10 to the power of 2 (or 100) which results in 47700

// exponential - to represent small numbers
let num = 477e-2;  // equal to dividing 477 to 10 to the power of 2 (or 100) which results in 4.77

// binary
let num = 0b1111;    // stands for 15

// octal
let num = 023; // stands for 19

// hexadecimal
let num = 0xFF; // stands for 255

Fungsi

// integer
let num = 47;

// float
let num = 47.32;

// exponential - to represent large numbers
let num = 477e2;  // equal to multiplying 477 to 10 to the power of 2 (or 100) which results in 47700

// exponential - to represent small numbers
let num = 477e-2;  // equal to dividing 477 to 10 to the power of 2 (or 100) which results in 4.77

// binary
let num = 0b1111;    // stands for 15

// octal
let num = 023; // stands for 19

// hexadecimal
let num = 0xFF; // stands for 255

Gunakan fungsi

// integer
let num = 47;

// float
let num = 47.32;

// exponential - to represent large numbers
let num = 477e2;  // equal to multiplying 477 to 10 to the power of 2 (or 100) which results in 47700

// exponential - to represent small numbers
let num = 477e-2;  // equal to dividing 477 to 10 to the power of 2 (or 100) which results in 4.77

// binary
let num = 0b1111;    // stands for 15

// octal
let num = 023; // stands for 19

// hexadecimal
let num = 0xFF; // stands for 255

Mengambil contoh yang sama dari bagian sebelumnya, inilah cara Anda menulis ulang menggunakan

// integer
let num = 47;

// float
let num = 47.32;

// exponential - to represent large numbers
let num = 477e2;  // equal to multiplying 477 to 10 to the power of 2 (or 100) which results in 47700

// exponential - to represent small numbers
let num = 477e-2;  // equal to dividing 477 to 10 to the power of 2 (or 100) which results in 4.77

// binary
let num = 0b1111;    // stands for 15

// octal
let num = 023; // stands for 19

// hexadecimal
let num = 0xFF; // stands for 255

// string created using double quotes ("")
let favePhrase = "Hello World!";

Sama seperti

// integer
let num = 47;

// float
let num = 47.32;

// exponential - to represent large numbers
let num = 477e2;  // equal to multiplying 477 to 10 to the power of 2 (or 100) which results in 47700

// exponential - to represent small numbers
let num = 477e-2;  // equal to dividing 477 to 10 to the power of 2 (or 100) which results in 4.77

// binary
let num = 0b1111;    // stands for 15

// octal
let num = 023; // stands for 19

// hexadecimal
let num = 0xFF; // stands for 255

// integer
let num = 47;

// float
let num = 47.32;

// exponential - to represent large numbers
let num = 477e2;  // equal to multiplying 477 to 10 to the power of 2 (or 100) which results in 47700

// exponential - to represent small numbers
let num = 477e-2;  // equal to dividing 477 to 10 to the power of 2 (or 100) which results in 4.77

// binary
let num = 0b1111;    // stands for 15

// octal
let num = 023; // stands for 19

// hexadecimal
let num = 0xFF; // stands for 255

// string created using double quotes ("")
let favePhrase = "Hello World!";

Dan seperti

// integer
let num = 47;

// float
let num = 47.32;

// exponential - to represent large numbers
let num = 477e2;  // equal to multiplying 477 to 10 to the power of 2 (or 100) which results in 47700

// exponential - to represent small numbers
let num = 477e-2;  // equal to dividing 477 to 10 to the power of 2 (or 100) which results in 4.77

// binary
let num = 0b1111;    // stands for 15

// octal
let num = 023; // stands for 19

// hexadecimal
let num = 0xFF; // stands for 255

// integer
let num = 47;

// float
let num = 47.32;

// exponential - to represent large numbers
let num = 477e2;  // equal to multiplying 477 to 10 to the power of 2 (or 100) which results in 47700

// exponential - to represent small numbers
let num = 477e-2;  // equal to dividing 477 to 10 to the power of 2 (or 100) which results in 4.77

// binary
let num = 0b1111;    // stands for 15

// octal
let num = 023; // stands for 19

// hexadecimal
let num = 0xFF; // stands for 255

parseInt(string, radix)

// string created using double quotes ("")
let favePhrase = "Hello World!";

Cara Mengonversi String menjadi Angka Menggunakan Fungsi // integer let num = 47; // float let num = 47.32; // exponential - to represent large numbers let num = 477e2; // equal to multiplying 477 to 10 to the power of 2 (or 100) which results in 47700 // exponential - to represent small numbers let num = 477e-2; // equal to dividing 477 to 10 to the power of 2 (or 100) which results in 4.77 // binary let num = 0b1111; // stands for 15 // octal let num = 023; // stands for 19 // hexadecimal let num = 0xFF; // stands for 255 6

Sintaks umum untuk fungsi

// integer
let num = 47;

// float
let num = 47.32;

// exponential - to represent large numbers
let num = 477e2;  // equal to multiplying 477 to 10 to the power of 2 (or 100) which results in 47700

// exponential - to represent small numbers
let num = 477e-2;  // equal to dividing 477 to 10 to the power of 2 (or 100) which results in 4.77

// binary
let num = 0b1111;    // stands for 15

// octal
let num = 023; // stands for 19

// hexadecimal
let num = 0xFF; // stands for 255

// string created using double quotes ("")
let favePhrase = "Hello World!";

Perbedaan antara fungsi

// integer
let num = 47;

// float
let num = 47.32;

// exponential - to represent large numbers
let num = 477e2;  // equal to multiplying 477 to 10 to the power of 2 (or 100) which results in 47700

// exponential - to represent small numbers
let num = 477e-2;  // equal to dividing 477 to 10 to the power of 2 (or 100) which results in 4.77

// binary
let num = 0b1111;    // stands for 15

// octal
let num = 023; // stands for 19

// hexadecimal
let num = 0xFF; // stands for 255

// integer
let num = 47;

// float
let num = 47.32;

// exponential - to represent large numbers
let num = 477e2;  // equal to multiplying 477 to 10 to the power of 2 (or 100) which results in 47700

// exponential - to represent small numbers
let num = 477e-2;  // equal to dividing 477 to 10 to the power of 2 (or 100) which results in 4.77

// binary
let num = 0b1111;    // stands for 15

// octal
let num = 023; // stands for 19

// hexadecimal
let num = 0xFF; // stands for 255

// integer
let num = 47;

// float
let num = 47.32;

// exponential - to represent large numbers
let num = 477e2;  // equal to multiplying 477 to 10 to the power of 2 (or 100) which results in 47700

// exponential - to represent small numbers
let num = 477e-2;  // equal to dividing 477 to 10 to the power of 2 (or 100) which results in 4.77

// binary
let num = 0b1111;    // stands for 15

// octal
let num = 023; // stands for 19

// hexadecimal
let num = 0xFF; // stands for 255

// integer
let num = 47;

// float
let num = 47.32;

// exponential - to represent large numbers
let num = 477e2;  // equal to multiplying 477 to 10 to the power of 2 (or 100) which results in 47700

// exponential - to represent small numbers
let num = 477e-2;  // equal to dividing 477 to 10 to the power of 2 (or 100) which results in 4.77

// binary
let num = 0b1111;    // stands for 15

// octal
let num = 023; // stands for 19

// hexadecimal
let num = 0xFF; // stands for 255

Mari kita ambil contoh berikut yang Anda lihat sebelumnya yang menggunakan

// integer
let num = 47;

// float
let num = 47.32;

// exponential - to represent large numbers
let num = 477e2;  // equal to multiplying 477 to 10 to the power of 2 (or 100) which results in 47700

// exponential - to represent small numbers
let num = 477e-2;  // equal to dividing 477 to 10 to the power of 2 (or 100) which results in 4.77

// binary
let num = 0b1111;    // stands for 15

// octal
let num = 023; // stands for 19

// hexadecimal
let num = 0xFF; // stands for 255

// string created using double quotes ("")
let favePhrase = "Hello World!";

Begitu

// integer
let num = 47;

// float
let num = 47.32;

// exponential - to represent large numbers
let num = 477e2;  // equal to multiplying 477 to 10 to the power of 2 (or 100) which results in 47700

// exponential - to represent small numbers
let num = 477e-2;  // equal to dividing 477 to 10 to the power of 2 (or 100) which results in 4.77

// binary
let num = 0b1111;    // stands for 15

// octal
let num = 023; // stands for 19

// hexadecimal
let num = 0xFF; // stands for 255

Inilah cara contoh yang sama bekerja dengan fungsi

// integer
let num = 47;

// float
let num = 47.32;

// exponential - to represent large numbers
let num = 477e2;  // equal to multiplying 477 to 10 to the power of 2 (or 100) which results in 47700

// exponential - to represent small numbers
let num = 477e-2;  // equal to dividing 477 to 10 to the power of 2 (or 100) which results in 4.77

// binary
let num = 0b1111;    // stands for 15

// octal
let num = 023; // stands for 19

// hexadecimal
let num = 0xFF; // stands for 255

// string created using double quotes ("")
let favePhrase = "Hello World!";

Karena

// integer
let num = 47;

// float
let num = 47.32;

// exponential - to represent large numbers
let num = 477e2;  // equal to multiplying 477 to 10 to the power of 2 (or 100) which results in 47700

// exponential - to represent small numbers
let num = 477e-2;  // equal to dividing 477 to 10 to the power of 2 (or 100) which results in 4.77

// binary
let num = 0b1111;    // stands for 15

// octal
let num = 023; // stands for 19

// hexadecimal
let num = 0xFF; // stands for 255

parseInt(string, radix)

Fungsi

// integer
let num = 47;

// float
let num = 47.32;

// exponential - to represent large numbers
let num = 477e2;  // equal to multiplying 477 to 10 to the power of 2 (or 100) which results in 47700

// exponential - to represent small numbers
let num = 477e-2;  // equal to dividing 477 to 10 to the power of 2 (or 100) which results in 4.77

// binary
let num = 0b1111;    // stands for 15

// octal
let num = 023; // stands for 19

// hexadecimal
let num = 0xFF; // stands for 255

Hal lain yang perlu diperhatikan adalah bahwa fungsi

// integer
let num = 47;

// float
let num = 47.32;

// exponential - to represent large numbers
let num = 477e2;  // equal to multiplying 477 to 10 to the power of 2 (or 100) which results in 47700

// exponential - to represent small numbers
let num = 477e-2;  // equal to dividing 477 to 10 to the power of 2 (or 100) which results in 4.77

// binary
let num = 0b1111;    // stands for 15

// octal
let num = 023; // stands for 19

// hexadecimal
let num = 0xFF; // stands for 255

// integer
let num = 47;

// float
let num = 47.32;

// exponential - to represent large numbers
let num = 477e2;  // equal to multiplying 477 to 10 to the power of 2 (or 100) which results in 47700

// exponential - to represent small numbers
let num = 477e-2;  // equal to dividing 477 to 10 to the power of 2 (or 100) which results in 4.77

// binary
let num = 0b1111;    // stands for 15

// octal
let num = 023; // stands for 19

// hexadecimal
let num = 0xFF; // stands for 255

// string created using double quotes ("")
let favePhrase = "Hello World!";

Cara Mengonversi String menjadi Angka Menggunakan Fungsi ________7______7

Objek

// integer
let num = 47;

// float
let num = 47.32;

// exponential - to represent large numbers
let num = 477e2;  // equal to multiplying 477 to 10 to the power of 2 (or 100) which results in 47700

// exponential - to represent small numbers
let num = 477e-2;  // equal to dividing 477 to 10 to the power of 2 (or 100) which results in 4.77

// binary
let num = 0b1111;    // stands for 15

// octal
let num = 023; // stands for 19

// hexadecimal
let num = 0xFF; // stands for 255

let num = 'h7';

let strToNum = parseInt(num, 10);

console.log(strToNum);

// NaN

// string created using double quotes ("")
let favePhrase = "Hello World!";

// string created using double quotes ("")
let favePhrase = "Hello World!";

Sesuatu yang harus diperhatikan dan diingat saat menggunakan metode Matematika untuk konversi tipe adalah saat Anda bekerja dengan pelampung, mereka akan mengubahnya menjadi bilangan bulat, dan pelampung akan kehilangan bagian desimalnya

Metode akan mengonversi string ke bilangan bulat terdekat yang setara

Fungsi

let num = 'h7';

let strToNum = parseInt(num, 10);

console.log(strToNum);

// NaN

// string created using double quotes ("")
let favePhrase = "Hello World!";

Jika nilai

// string created using double quotes ("")
let favePhrase = "Hello World!";

// string created using double quotes ("")
let favePhrase = "Hello World!";

// string created using backticks (``)
let favePhrase = `Hello World!`;

Jika string berisi karakter non-numerik, ________ 34 _______9 mengembalikan

parseInt(string, radix)

// string created using backticks (``)
let favePhrase = `Hello World!`;

Fungsi

// string created using double quotes ("")
let favePhrase = "Hello World!";

// string created using backticks (``)
let favePhrase = `Hello World!`;

Jika string berisi karakter non-numerik,

// string created using double quotes ("")
let favePhrase = "Hello World!";

parseInt(string, radix)

// string created using backticks (``)
let favePhrase = `Hello World!`;

Fungsi

// string created using double quotes ("")
let favePhrase = "Hello World!";

// string created using double quotes ("")
let favePhrase = "Hello World!";

// string created using backticks (``)
let favePhrase = `Hello World!`;

Mirip dengan contoh sebelumnya, fungsi

// string created using double quotes ("")
let favePhrase = "Hello World!";

parseInt(string, radix)

// string created using backticks (``)
let favePhrase = `Hello World!`;

Cara Mengonversi String menjadi Angka dengan Mengalikan dan Membagi dengan // integer let num = 47; // float let num = 47.32; // exponential - to represent large numbers let num = 477e2; // equal to multiplying 477 to 10 to the power of 2 (or 100) which results in 47700 // exponential - to represent small numbers let num = 477e-2; // equal to dividing 477 to 10 to the power of 2 (or 100) which results in 4.77 // binary let num = 0b1111; // stands for 15 // octal let num = 023; // stands for 19 // hexadecimal let num = 0xFF; // stands for 255 8

Mengalikan dengan

// integer
let num = 47;

// float
let num = 47.32;

// exponential - to represent large numbers
let num = 477e2;  // equal to multiplying 477 to 10 to the power of 2 (or 100) which results in 47700

// exponential - to represent small numbers
let num = 477e-2;  // equal to dividing 477 to 10 to the power of 2 (or 100) which results in 4.77

// binary
let num = 0b1111;    // stands for 15

// octal
let num = 023; // stands for 19

// hexadecimal
let num = 0xFF; // stands for 255

// string created using backticks (``)
let favePhrase = `Hello World!`;

Dan jika Anda ingin melakukan konversi tipe pada float, mengalikan dengan

// integer
let num = 47;

// float
let num = 47.32;

// exponential - to represent large numbers
let num = 477e2;  // equal to multiplying 477 to 10 to the power of 2 (or 100) which results in 47700

// exponential - to represent small numbers
let num = 477e-2;  // equal to dividing 477 to 10 to the power of 2 (or 100) which results in 4.77

// binary
let num = 0b1111;    // stands for 15

// octal
let num = 023; // stands for 19

// hexadecimal
let num = 0xFF; // stands for 255

// string created using backticks (``)
let favePhrase = `Hello World!`;

Jika string berisi karakter non-numerik, string akan mengembalikan

parseInt(string, radix)

// string created using backticks (``)
let favePhrase = `Hello World!`;

Cara mengonversi string menjadi bilangan bulat ini juga berfungsi dengan membagi string dengan

// integer
let num = 47;

// float
let num = 47.32;

// exponential - to represent large numbers
let num = 477e2;  // equal to multiplying 477 to 10 to the power of 2 (or 100) which results in 47700

// exponential - to represent small numbers
let num = 477e-2;  // equal to dividing 477 to 10 to the power of 2 (or 100) which results in 4.77

// binary
let num = 0b1111;    // stands for 15

// octal
let num = 023; // stands for 19

// hexadecimal
let num = 0xFF; // stands for 255

// string created using backticks (``)
let favePhrase = `Hello World!`;

Pada titik ini, perlu juga disebutkan apa yang terjadi saat Anda mencoba menambahkan

// integer
let num = 47;

// float
let num = 47.32;

// exponential - to represent large numbers
let num = 477e2;  // equal to multiplying 477 to 10 to the power of 2 (or 100) which results in 47700

// exponential - to represent small numbers
let num = 477e-2;  // equal to dividing 477 to 10 to the power of 2 (or 100) which results in 4.77

// binary
let num = 0b1111;    // stands for 15

// octal
let num = 023; // stands for 19

// hexadecimal
let num = 0xFF; // stands for 255

// integer
let num = 47;

// float
let num = 47.32;

// exponential - to represent large numbers
let num = 477e2;  // equal to multiplying 477 to 10 to the power of 2 (or 100) which results in 47700

// exponential - to represent small numbers
let num = 477e-2;  // equal to dividing 477 to 10 to the power of 2 (or 100) which results in 4.77

// binary
let num = 0b1111;    // stands for 15

// octal
let num = 023; // stands for 19

// hexadecimal
let num = 0xFF; // stands for 255

Pada contoh di atas,

// integer
let num = 47;

// float
let num = 47.32;

// exponential - to represent large numbers
let num = 477e2;  // equal to multiplying 477 to 10 to the power of 2 (or 100) which results in 47700

// exponential - to represent small numbers
let num = 477e-2;  // equal to dividing 477 to 10 to the power of 2 (or 100) which results in 4.77

// binary
let num = 0b1111;    // stands for 15

// octal
let num = 023; // stands for 19

// hexadecimal
let num = 0xFF; // stands for 255

// string created using double quotes ("")
let favePhrase = "Hello World!";

Cara Mengonversi String menjadi Angka dengan Menggunakan Operator Unary // integer let num = 47; // float let num = 47.32; // exponential - to represent large numbers let num = 477e2; // equal to multiplying 477 to 10 to the power of 2 (or 100) which results in 47700 // exponential - to represent small numbers let num = 477e-2; // equal to dividing 477 to 10 to the power of 2 (or 100) which results in 4.77 // binary let num = 0b1111; // stands for 15 // octal let num = 023; // stands for 19 // hexadecimal let num = 0xFF; // stands for 255 9

Menggunakan operator

// integer
let num = 47;

// float
let num = 47.32;

// exponential - to represent large numbers
let num = 477e2;  // equal to multiplying 477 to 10 to the power of 2 (or 100) which results in 47700

// exponential - to represent small numbers
let num = 477e-2;  // equal to dividing 477 to 10 to the power of 2 (or 100) which results in 4.77

// binary
let num = 0b1111;    // stands for 15

// octal
let num = 023; // stands for 19

// hexadecimal
let num = 0xFF; // stands for 255

Anda menempatkan operator plus,

// integer
let num = 47;

// float
let num = 47.32;

// exponential - to represent large numbers
let num = 477e2;  // equal to multiplying 477 to 10 to the power of 2 (or 100) which results in 47700

// exponential - to represent small numbers
let num = 477e-2;  // equal to dividing 477 to 10 to the power of 2 (or 100) which results in 4.77

// binary
let num = 0b1111;    // stands for 15

// octal
let num = 023; // stands for 19

// hexadecimal
let num = 0xFF; // stands for 255

// integer
let num = 47;

// float
let num = 47.32;

// exponential - to represent large numbers
let num = 477e2;  // equal to multiplying 477 to 10 to the power of 2 (or 100) which results in 47700

// exponential - to represent small numbers
let num = 477e-2;  // equal to dividing 477 to 10 to the power of 2 (or 100) which results in 4.77

// binary
let num = 0b1111;    // stands for 15

// octal
let num = 023; // stands for 19

// hexadecimal
let num = 0xFF; // stands for 255

atau pelampung

// integer
let num = 47;

// float
let num = 47.32;

// exponential - to represent large numbers
let num = 477e2;  // equal to multiplying 477 to 10 to the power of 2 (or 100) which results in 47700

// exponential - to represent small numbers
let num = 477e-2;  // equal to dividing 477 to 10 to the power of 2 (or 100) which results in 4.77

// binary
let num = 0b1111;    // stands for 15

// octal
let num = 023; // stands for 19

// hexadecimal
let num = 0xFF; // stands for 255

Mirip dengan cara lain yang telah Anda lihat untuk mengonversi string menjadi angka, seluruh string hanya boleh berisi karakter numerik agar operator

// integer
let num = 47;

// float
let num = 47.32;

// exponential - to represent large numbers
let num = 477e2;  // equal to multiplying 477 to 10 to the power of 2 (or 100) which results in 47700

// exponential - to represent small numbers
let num = 477e-2;  // equal to dividing 477 to 10 to the power of 2 (or 100) which results in 4.77

// binary
let num = 0b1111;    // stands for 15

// octal
let num = 023; // stands for 19

// hexadecimal
let num = 0xFF; // stands for 255

parseInt(string, radix)

// integer
let num = 47;

// float
let num = 47.32;

// exponential - to represent large numbers
let num = 477e2;  // equal to multiplying 477 to 10 to the power of 2 (or 100) which results in 47700

// exponential - to represent small numbers
let num = 477e-2;  // equal to dividing 477 to 10 to the power of 2 (or 100) which results in 4.77

// binary
let num = 0b1111;    // stands for 15

// octal
let num = 023; // stands for 19

// hexadecimal
let num = 0xFF; // stands for 255

Kesimpulan

Dan begitulah. Anda sekarang mengetahui beberapa cara untuk mengonversi string menjadi angka dalam JavaScript

Untuk mempelajari lebih lanjut tentang JavaScript, buka Algoritma JavaScript dan Sertifikasi Struktur Data freeCodeCamp

Ini adalah kurikulum gratis, dipikirkan dengan matang, dan terstruktur di mana Anda akan belajar secara interaktif. Pada akhirnya, Anda juga akan membangun 5 proyek untuk mengklaim sertifikasi dan memperkuat pengetahuan Anda

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Dionysia Lemonaki

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