JavaScript: Number.parseInt

By Xah Lee. Date: .

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

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

〔►see JavaScript: the Global Object

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

Using the radix argument.

// hexadecimal string to number
console.log(
    parseInt("f", 16)
); // 15
// binary string to number
console.log (
    parseInt("101", 2)
); // 5

Reference

ECMAScript® 2016 Language Specification#sec-number.parseint

Number Topic


  1. JavaScript: Number Object
  2. JavaScript: Number Constructor
  3. JavaScript: Number.prototype

String Topic

  1. JavaScript: Default Charset/Encoding
  2. JavaScript: String is 16-Bit Unit Sequence
  3. JavaScript: Unicode Character Escape Sequence
  4. JavaScript: Allowed Characters in Identifier
  5. HTML: Allowed Characters in id Attribute
  6. HTML: Character Sets and Encoding
  7. HTML XML Entities

  1. JavaScript: Template String
  2. JavaScript: Convert String to Number
  3. JavaScript Encode URL, Escape String
  4. JavaScript: Format Number
  5. JavaScript: JSON Object

  1. JavaScript: String Object
  2. JavaScript: String.prototype
  3. JavaScript: String Constructor
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