JS: Convert String to Number

By Xah Lee. Date: . Last updated: .

String (decimal number) to Decimal Number

See:

JS: Number.parseFloat

(decimal, binary, hexadecimal) String to Integer

See:

JS: Number.parseInt

Number to String

see

JS: Number.prototype.toString

Note: JavaScript automatically convert number to string. Adding a string to number results string.

let x = 3 + "4";
console.log(x); // 34
console.log(typeof x); // string

String Topic

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

Character Topic

  1. JS: String Code Unit vs Code Point
  2. JS: Convert Character To/From Codepoint
  3. JS: String.fromCodePoint
  4. JS: String.fromCharCode
  5. JS: String.prototype.charAt
  6. JS: String.prototype.charCodeAt
  7. JS: String.prototype.codePointAt
  8. JS: Convert Decimal/Hexadecimal
  9. JS: Unicode Escape Sequence

Number Topic

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