https://github.com/stdlib-js/math-base-special-truncf
Round a single-precision floating-point number toward zero.
https://github.com/stdlib-js/math-base-special-truncf
function integer javascript math mathematics node node-js nodejs number polyfill ponyfill round special special-function stdlib trunc truncate
Last synced: about 1 month ago
JSON representation
Round a single-precision floating-point number toward zero.
- Host: GitHub
- URL: https://github.com/stdlib-js/math-base-special-truncf
- Owner: stdlib-js
- License: apache-2.0
- Created: 2021-06-14T13:42:11.000Z (almost 4 years ago)
- Default Branch: main
- Last Pushed: 2025-04-05T04:42:46.000Z (about 2 months ago)
- Last Synced: 2025-04-12T21:16:43.705Z (about 1 month ago)
- Topics: function, integer, javascript, math, mathematics, node, node-js, nodejs, number, polyfill, ponyfill, round, special, special-function, stdlib, trunc, truncate
- Language: Python
- Homepage: https://github.com/stdlib-js/stdlib
- Size: 352 KB
- Stars: 2
- Watchers: 3
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- Changelog: CHANGELOG.md
- Contributing: CONTRIBUTING.md
- License: LICENSE
- Code of conduct: CODE_OF_CONDUCT.md
- Citation: CITATION.cff
- Security: SECURITY.md
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README
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# Truncate
[![NPM version][npm-image]][npm-url] [![Build Status][test-image]][test-url] [![Coverage Status][coverage-image]][coverage-url]
> Round a single-precision floating-point number toward zero.
## Installation
```bash
npm install @stdlib/math-base-special-truncf
```
Alternatively,
- To load the package in a website via a `script` tag without installation and bundlers, use the [ES Module][es-module] available on the [`esm`][esm-url] branch (see [README][esm-readme]).
- If you are using Deno, visit the [`deno`][deno-url] branch (see [README][deno-readme] for usage intructions).
- For use in Observable, or in browser/node environments, use the [Universal Module Definition (UMD)][umd] build available on the [`umd`][umd-url] branch (see [README][umd-readme]).
The [branches.md][branches-url] file summarizes the available branches and displays a diagram illustrating their relationships.
To view installation and usage instructions specific to each branch build, be sure to explicitly navigate to the respective README files on each branch, as linked to above.
## Usage
```javascript
var truncf = require( '@stdlib/math-base-special-truncf' );
```
#### truncf( x )
Rounds a single-precision floating-point number toward zero.
```javascript
var v = truncf( -4.2 );
// returns -4.0
v = truncf( 9.99999 );
// returns 9.0
v = truncf( 0.0 );
// returns 0.0
v = truncf( -0.0 );
// returns -0.0
v = truncf( NaN );
// returns NaN
v = truncf( Infinity );
// returns Infinity
v = truncf( -Infinity );
// returns -Infinity
```
## Examples
```javascript
var uniform = require( '@stdlib/random-array-uniform' );
var logEachMap = require( '@stdlib/console-log-each-map' );
var truncf = require( '@stdlib/math-base-special-truncf' );
var opts = {
'dtype': 'float32'
};
var x = uniform( 100, -50.0, 50.0, opts );
logEachMap( 'truncf(%0.4f) = %0.4f', x, truncf );
```
* * *
## C APIs
### Usage
```c
#include "stdlib/math/base/special/truncf.h"
```
#### stdlib_base_truncf( x )
Rounds a single-precision floating-point number toward zero.
```c
float y = stdlib_base_truncf( 3.5f );
// returns 3.0f
```
The function accepts the following arguments:
- **x**: `[in] float` input value.
```c
float stdlib_base_truncf( const float x );
```
### Examples
```c
#include "stdlib/math/base/special/truncf.h"
#include
int main( void ) {
const float x[] = { 3.14f, -3.14f, 0.0f, 0.0f/0.0f };
float y;
int i;
for ( i = 0; i < 4; i++ ) {
y = stdlib_base_truncf( x[ i ] );
printf( "trunc(%f) = %f\n", x[ i ], y );
}
}
```
* * *
## See Also
- [`@stdlib/math-base/special/ceilf`][@stdlib/math/base/special/ceilf]: round a single-precision floating-point number toward positive infinity.
- [`@stdlib/math-base/special/floorf`][@stdlib/math/base/special/floorf]: round a single-precision floating-point numeric value toward negative infinity.
- [`@stdlib/math-base/special/trunc`][@stdlib/math/base/special/trunc]: round a double-precision floating-point number toward zero.
* * *
## 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 © 2016-2025. The Stdlib [Authors][stdlib-authors].
[npm-image]: http://img.shields.io/npm/v/@stdlib/math-base-special-truncf.svg
[npm-url]: https://npmjs.org/package/@stdlib/math-base-special-truncf
[test-image]: https://github.com/stdlib-js/math-base-special-truncf/actions/workflows/test.yml/badge.svg?branch=main
[test-url]: https://github.com/stdlib-js/math-base-special-truncf/actions/workflows/test.yml?query=branch:main
[coverage-image]: https://img.shields.io/codecov/c/github/stdlib-js/math-base-special-truncf/main.svg
[coverage-url]: https://codecov.io/github/stdlib-js/math-base-special-truncf?branch=main
[chat-image]: https://img.shields.io/gitter/room/stdlib-js/stdlib.svg
[chat-url]: https://app.gitter.im/#/room/#stdlib-js_stdlib:gitter.im
[stdlib]: https://github.com/stdlib-js/stdlib
[stdlib-authors]: https://github.com/stdlib-js/stdlib/graphs/contributors
[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/math-base-special-truncf/tree/deno
[deno-readme]: https://github.com/stdlib-js/math-base-special-truncf/blob/deno/README.md
[umd-url]: https://github.com/stdlib-js/math-base-special-truncf/tree/umd
[umd-readme]: https://github.com/stdlib-js/math-base-special-truncf/blob/umd/README.md
[esm-url]: https://github.com/stdlib-js/math-base-special-truncf/tree/esm
[esm-readme]: https://github.com/stdlib-js/math-base-special-truncf/blob/esm/README.md
[branches-url]: https://github.com/stdlib-js/math-base-special-truncf/blob/main/branches.md
[stdlib-license]: https://raw.githubusercontent.com/stdlib-js/math-base-special-truncf/main/LICENSE
[@stdlib/math/base/special/ceilf]: https://github.com/stdlib-js/math-base-special-ceilf
[@stdlib/math/base/special/floorf]: https://github.com/stdlib-js/math-base-special-floorf
[@stdlib/math/base/special/trunc]: https://github.com/stdlib-js/math-base-special-trunc