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 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

Character Topic

  1. JS: Character, Code Unit, 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
Liket it? Put $5 at patreon.

Or, Buy JavaScript in Depth

If you have a question, put $5 at patreon and message me.

Web Dev Tutorials

  1. HTML
  2. Visual CSS
  3. JS Basics
  4. JS in Depth
  5. JS Reference
  6. DOM
  7. SVG
  8. JS Misc