String

`String.fromCharCode`

Returns a string created from the specified sequence of UTF-16 code units

Syntax

JavaScript

String.fromCharCode(...nums)

Parameters

Parameter	Type	Description
nums	number[]	Sequence of numbers that are UTF-16 code units

Return Value

A string of the specified characters

Examples

Basic Usage

console.log(String.fromCharCode(72, 101, 108, 108, 111)); // 'Hello'

Practical Example

console.log(String.fromCharCode(65)); // 'A'
console.log(String.fromCharCode(9731)); // '☃'

Advanced Usage

const chars = [74, 83].map(c => String.fromCharCode(c));
console.log(chars.join('')); // 'JS'

Understanding String.fromCharCode

The String.fromCharCode method in JavaScript returns a string created from the specified sequence of UTF-16 code units. It belongs to the String object and is one of the most widely used methods for working with string values in modern JavaScript and TypeScript applications.

The method signature is String.fromCharCode(...nums). It accepts 1 parameter: nums. When called, it returns a string of the specified characters. Understanding when and how to use fromCharCode() helps you write more expressive, readable code.

Common use cases for String.fromCharCode include data transformation, input validation, API response processing, and building reusable utility functions. It works well alongside related methods like string-fromcodepoint, string-charcodeat, enabling you to chain operations together for complex data manipulation pipelines.

Browser support for String.fromCharCode 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.