Create a string from a sequence of Unicode code points.
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> Create a string from a sequence of Unicode [code points][code-point].
``bash`
npm install @stdlib/string-from-code-point
`javascript`
var fromCodePoint = require( '@stdlib/string-from-code-point' );
#### fromCodePoint( pt1\[, pt2\[, pt3\[, ...]]] )
Creates a string from a sequence of Unicode [code points][code-point].
`javascript`
var out = fromCodePoint( 9731 );
// returns '☃'
In addition to providing [code points][code-point] as separate arguments, the function supports providing an array-like object as a single argument containing a sequence of [code points][code-point].
`javascript
var Uint16Array = require( '@stdlib/array-uint16' );
var out = fromCodePoint( 97, 98, 99 );
// returns 'abc'
out = fromCodePoint( new Uint16Array( [ 97, 98, 99 ] ) );
// returns 'abc'
`
- This function differs from [String.fromCharCode][mdn-string-fromcharcode] in the following ways:
- The function provides support for all valid Unicode values (up to 21 bits). While most common Unicode values can be represented using one 16-bit unit, higher code point characters require two 16-bit units (a surrogate pair consisting of a high and a low surrogate) to form a single character. [String.fromCharCode][mdn-string-fromcharcode] does not support surrogate pairs, supporting only UCS-2, a subset of [UTF-16][utf-16].
- This function differs from [String.fromCodePoint][mdn-string-fromcodepoint] in the following ways:
- The function supports explicitly providing an array-like object containing a sequence of [code points][code-point].null
- The function requires at least one [code point][code-point].
- The function requires that all [code points][code-point] be nonnegative integers. The function does not support values, such as , undefined, true, false, '0', '1', etc., which can be cast to integer values.
`javascript
var randu = require( '@stdlib/random-base-randu' );
var floor = require( '@stdlib/math-base-special-floor' );
var UNICODE_MAX_BMP = require( '@stdlib/constants-unicode-max-bmp' );
var fromCodePoint = require( '@stdlib/string-from-code-point' );
var x;
var i;
for ( i = 0; i < 100; i++ ) {
x = floor( randu()*UNICODE_MAX_BMP );
console.log( '%d => %s', x, fromCodePoint( x ) );
}
`
- [@stdlib/string-from-code-point-cli][@stdlib/string-from-code-point-cli]: CLI package for use as a command-line utility.
- [@stdlib/string-code-point-at][@stdlib/string/code-point-at]: return a Unicode code point from a string at a specified position.
*
This package is part of [stdlib][stdlib], a standard library for JavaScript and Node.js, with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.
For more information on the project, filing bug reports and feature requests, and guidance on how to develop [stdlib][stdlib], see the main project [repository][stdlib].
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---
See [LICENSE][stdlib-license].
Copyright © 2016-2026. The Stdlib [Authors][stdlib-authors].
[@stdlib/string-from-code-point-cli]: https://www.npmjs.com/package/@stdlib/string-from-code-point-cli
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[test-url]: https://github.com/stdlib-js/string-from-code-point/actions/workflows/test.yml?query=branch:v0.2.3
[coverage-image]: https://img.shields.io/codecov/c/github/stdlib-js/string-from-code-point/main.svg
[coverage-url]: https://codecov.io/github/stdlib-js/string-from-code-point?branch=main
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[stdlib]: https://github.com/stdlib-js/stdlib
[stdlib-authors]: https://github.com/stdlib-js/stdlib/graphs/contributors
[cli-section]: https://github.com/stdlib-js/string-from-code-point#cli
[cli-url]: https://github.com/stdlib-js/string-from-code-point/tree/cli
[@stdlib/string-from-code-point]: https://github.com/stdlib-js/string-from-code-point/tree/main
[umd]: https://github.com/umdjs/umd
[es-module]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Modules
[deno-url]: https://github.com/stdlib-js/string-from-code-point/tree/deno
[deno-readme]: https://github.com/stdlib-js/string-from-code-point/blob/deno/README.md
[umd-url]: https://github.com/stdlib-js/string-from-code-point/tree/umd
[umd-readme]: https://github.com/stdlib-js/string-from-code-point/blob/umd/README.md
[esm-url]: https://github.com/stdlib-js/string-from-code-point/tree/esm
[esm-readme]: https://github.com/stdlib-js/string-from-code-point/blob/esm/README.md
[branches-url]: https://github.com/stdlib-js/string-from-code-point/blob/main/branches.md
[stdlib-license]: https://raw.githubusercontent.com/stdlib-js/string-from-code-point/main/LICENSE
[code-point]: https://en.wikipedia.org/wiki/Code_point
[standard-streams]: https://en.wikipedia.org/wiki/Standard_streams
[mdn-regexp]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions
[mdn-string-fromcharcode]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/fromCharCode
[mdn-string-fromcodepoint]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/fromCodePoint
[utf-16]: https://en.wikipedia.org/wiki/UTF-16
[@stdlib/string/code-point-at]: https://www.npmjs.com/package/@stdlib/string-code-point-at