Number

`Number.prototype.toString`

Returns a string representing the specified Number object in the specified radix (base)

Syntax

JavaScript

number.toString(radix?)

Parameters

Parameter	Type	Description
radix	number	An integer between 2 and 36 specifying the base

Return Value

A string representing the specified number in the given radix

Examples

Basic Usage

console.log((255).toString(16)); // 'ff'
console.log((255).toString(2)); // '11111111'

Practical Example

console.log((10).toString()); // '10'
console.log((10).toString(8)); // '12'

Advanced Usage

function toHex(num: number) {
  return '0x' + num.toString(16).toUpperCase();
}
console.log(toHex(255)); // '0xFF'

Understanding Number.prototype.toString

The Number.prototype.toString method in JavaScript returns a string representing the specified Number object in the specified radix (base). It belongs to the Number object and is one of the most widely used methods for working with number values in modern JavaScript and TypeScript applications.

The method signature is number.toString(radix?). It accepts 1 parameter: radix. When called, it returns a string representing the specified number in the given radix. Understanding when and how to use toString() helps you write more expressive, readable code.

Common use cases for Number.prototype.toString include data transformation, input validation, API response processing, and building reusable utility functions. It works well alongside related methods like number-parseint, number-tofixed, string-charat, enabling you to chain operations together for complex data manipulation pipelines.

Browser support for Number.prototype.toString is excellent across all modern browsers including Chrome, Firefox, Safari, and Edge. It is also fully supported in Node.js and Deno. For older environments, transpilation with Babel or a polyfill may be needed.