JS: Convert String to Number

By Xah Lee. Date: . Last updated: .

String (decimal number) to Decimal Number


JS: Number.parseFloat

(decimal, binary, hexadecimal) String to Integer


JS: Number.parseInt

Number to String


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

JS String

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

JS 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
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