JS: Number.parseInt

By Xah Lee. Date: . Last updated: .

Convert string to a integer number. radix defaults to 10.

// string to number
console.log(
    parseInt("324")  // 324
);

Number.parseInt is same function as the global function parseInt.

[see JS: the Global Object]

console.log ( Number.parseInt === window.parseInt ); // true

// in nodejs
// console.log ( Number.parseInt === global.parseInt );

Hexadecimal String to Number

Using the radix argument.

// hexadecimal string to number
console.log(
    parseInt("f", 16)
); // 15

Binary String to Number

// binary string to number
console.log (
    parseInt("101", 2)
); // 5

Reference

ECMAScript® 2016 Language Specification#sec-number.parseint

Number Topic

  1. JS: Format Number
  2. JS: String to Number
  3. JS: Number Object
  4. JS: Number Constructor
  5. JS: Number.prototype

String Topic

  1. JS: String Overview
  2. JS: Template String
  3. JS: String Escape Sequence
  4. JS: Unicode Escape Sequence
  5. JS: String Object
  6. JS: String.prototype
  7. JS: String to Number
  8. JS: Encode URL, Escape String
  9. JS: Format Number
  10. JS: JSON
  11. JS: Source Code Encoding
  12. JS: Allowed Characters in Identifier
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