JavaScript: Convert String to Number

By Xah Lee. Date: . Last updated: .

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

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

String to Number

〔►see JavaScript: Number.parseFloat

〔►see JavaScript: Number.parseInt

Number to String

〔►see JavaScript: Number.prototype.toString

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

Character Topic

  1. JavaScript: String is 16-Bit Unit Sequence
  2. JavaScript: Convert Character To/From Codepoint
  3. JavaScript: String.fromCodePoint
  4. JavaScript: String.fromCharCode
  5. JavaScript: String.prototype.charAt
  6. JavaScript: String.prototype.charCodeAt
  7. JavaScript: String.prototype.codePointAt
  8. JavaScript: Convert Decimal/Hexadecimal
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