Right pad a string.
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> Right pad a string.
``bash`
npm install @stdlib/string-right-pad
`javascript`
var rpad = require( '@stdlib/string-right-pad' );
#### rpad( str, len\[, pad] )
Right pads a string such that the padded string has a length of at least len.
`javascript`
var str = rpad( 'a', 5 );
// returns 'a '
By default, an input string is padded with spaces. To pad with a different character or sequence of characters, provide a pad string.
`javascript
var str = rpad( 'beep', 10, 'p' );
// returns 'beeppppppp'
str = rpad( 'beep', 12, 'boop' );
// returns 'beepboopboop'
`
- An output string is not guaranteed to have a length of exactly len, but to have a length of at least len. To generate a padded string having a length equal to len
`javascript
var str = rpad( 'beep', 10, 'boop' );
// returns 'beepboopboop' => length 12
str = str.substring( 0, 10 );
// returns 'beepboopbo' => length 10
`
`javascript
var round = require( '@stdlib/math-base-special-round' );
var randu = require( '@stdlib/random-base-randu' );
var rpad = require( '@stdlib/string-right-pad' );
var str = 'beep';
var n;
var i;
for ( i = 0; i < 100; i++ ) {
n = round( randu()*10.0 ) + str.length;
console.log( rpad( str, n, 'p' ) );
}
`
- [@stdlib/string-right-pad-cli][@stdlib/string-right-pad-cli]: CLI package for use as a command-line utility.
- [@stdlib/string-left-pad][@stdlib/string/left-pad]: left pad a string.
- [@stdlib/string-pad][@stdlib/string/pad]: pad a string.
*
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-right-pad-cli]: https://www.npmjs.com/package/@stdlib/string-right-pad-cli
[npm-image]: http://img.shields.io/npm/v/@stdlib/string-right-pad.svg
[npm-url]: https://npmjs.org/package/@stdlib/string-right-pad
[test-image]: https://github.com/stdlib-js/string-right-pad/actions/workflows/test.yml/badge.svg?branch=v0.2.3
[test-url]: https://github.com/stdlib-js/string-right-pad/actions/workflows/test.yml?query=branch:v0.2.3
[coverage-image]: https://img.shields.io/codecov/c/github/stdlib-js/string-right-pad/main.svg
[coverage-url]: https://codecov.io/github/stdlib-js/string-right-pad?branch=main
[chat-image]: https://img.shields.io/badge/zulip-join_chat-brightgreen.svg
[chat-url]: https://stdlib.zulipchat.com
[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-right-pad#cli
[cli-url]: https://github.com/stdlib-js/string-right-pad/tree/cli
[@stdlib/string-right-pad]: https://github.com/stdlib-js/string-right-pad/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-right-pad/tree/deno
[deno-readme]: https://github.com/stdlib-js/string-right-pad/blob/deno/README.md
[umd-url]: https://github.com/stdlib-js/string-right-pad/tree/umd
[umd-readme]: https://github.com/stdlib-js/string-right-pad/blob/umd/README.md
[esm-url]: https://github.com/stdlib-js/string-right-pad/tree/esm
[esm-readme]: https://github.com/stdlib-js/string-right-pad/blob/esm/README.md
[branches-url]: https://github.com/stdlib-js/string-right-pad/blob/main/branches.md
[stdlib-license]: https://raw.githubusercontent.com/stdlib-js/string-right-pad/main/LICENSE
[standard-streams]: https://en.wikipedia.org/wiki/Standard_streams
[mdn-regexp]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions
[@stdlib/string/left-pad]: https://www.npmjs.com/package/@stdlib/string-left-pad
[@stdlib/string/pad]: https://www.npmjs.com/package/@stdlib/string-pad