npm package: @stdlib/string-from-code-point
Description: Create a string from a sequence of Unicode code points.
Author: The Stdlib Authors
Latest version: 0.2.3

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# fromCodePoint

[![NPM version][npm-image]][npm-url] [![Build Status][test-image]][test-url] [![Coverage Status][coverage-image]][coverage-url] <!-- [![dependencies][dependencies-image]][dependencies-url] -->

> Create a string from a sequence of Unicode [code points][code-point].

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<section class="intro">

</section>

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<!-- Package usage documentation. -->

<section class="installation">

## Installation

```bash
npm install @stdlib/string-from-code-point
```

</section>

<section class="usage">

## Usage

```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'
```

</section>

<!-- /.usage -->

<!-- Package usage notes. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->

<section class="notes">

## Notes

-   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].
    -   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 `null`, `undefined`, `true`, `false`, `'0'`, `'1'`, etc., which can be cast to integer values.

</section>

<!-- /.notes -->

<!-- Package usage examples. -->

<section class="examples">

## Examples

<!-- eslint no-undef: "error" -->

```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 ) );
}
```

</section>

<!-- /.examples -->

<!-- Section for describing a command-line interface. -->



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<section class="related">

## See Also

-   <span class="package-name">[`@stdlib/string-from-code-point-cli`][@stdlib/string-from-code-point-cli]</span><span class="delimiter">: </span><span class="description">CLI package for use as a command-line utility.</span>
-   <span class="package-name">[`@stdlib/string-code-point-at`][@stdlib/string/code-point-at]</span><span class="delimiter">: </span><span class="description">return a Unicode code point from a string at a specified position.</span>

</section>

<!-- /.related -->

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<section class="main-repo" >

* * *

## Notice

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].

#### Community

[![Chat][chat-image]][chat-url]

---

## License

See [LICENSE][stdlib-license].


## Copyright

Copyright &copy; 2016-2026. The Stdlib [Authors][stdlib-authors].

</section>

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[@stdlib/string-from-code-point-cli]: https://www.npmjs.com/package/@stdlib/string-from-code-point-cli

[npm-image]: http://img.shields.io/npm/v/@stdlib/string-from-code-point.svg
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[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

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[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

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[@stdlib/string/code-point-at]: https://www.npmjs.com/package/@stdlib/string-code-point-at

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