@stdlib/math-base-special-abs
v0.2.3TypeScript
Compute the absolute value of a double-precision floating-point number.
0/weekUpdated 4 days agoApache-2.0Unpacked: 43.6 KB
Published by The Stdlib Authors
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abs
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> Compute the [absolute value][absolute-value] of a double-precision floating-point number.
The [absolute value][absolute-value] is defined as
Installation
``bash`
npm install @stdlib/math-base-special-abs
Usage
`javascript`
var abs = require( '@stdlib/math-base-special-abs' );
#### abs( x )
Computes the [absolute value][absolute-value] of a double-precision floating-point number.
`javascript
var v = abs( -1.0 );
// returns 1.0
v = abs( 2.0 );
// returns 2.0
v = abs( 0.0 );
// returns 0.0
v = abs( -0.0 );
// returns 0.0
v = abs( NaN );
// returns NaN
`
Examples
`javascript
var discreteUniform = require( '@stdlib/random-array-discrete-uniform' );
var logEachMap = require( '@stdlib/console-log-each-map' );
var abs = require( '@stdlib/math-base-special-abs' );
var x = discreteUniform( 100, -100, 100, {
'dtype': 'float64'
});
logEachMap( 'abs(%d) = %d', x, abs );
`
*
C APIs
$3
`c`
#include "stdlib/math/base/special/abs.h"
#### stdlib_base_abs( x )
Computes the absolute value of a double-precision floating-point number.
`c`
double y = stdlib_base_abs( -5.0 );
// returns 5.0
The function accepts the following arguments:
- x: [in] double input value.
`c`
double stdlib_base_abs( const double x );
$3
`c
#include "stdlib/math/base/special/abs.h"
#include
int main( void ) {
const double x[] = { 3.14, -3.14, 0.0, 0.0/0.0 };
double y;
int i;
for ( i = 0; i < 4; i++ ) {
y = stdlib_base_abs( x[ i ] );
printf( "|%lf| = %lf\n", x[ i ], y );
}
}
`
*
See Also
- [@stdlib/math-base/special/abs2][@stdlib/math/base/special/abs2]: compute the squared absolute value of a double-precision floating-point number.
- [@stdlib/math-base/special/absf][@stdlib/math/base/special/absf]: compute the absolute value of a single-precision floating-point number.
- [@stdlib/math-base/special/labs][@stdlib/math/base/special/labs]: compute an absolute value of a signed 32-bit integer.
*
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 © 2016-2026. The Stdlib [Authors][stdlib-authors].
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[npm-url]: https://npmjs.org/package/@stdlib/math-base-special-abs
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[test-url]: https://github.com/stdlib-js/math-base-special-abs/actions/workflows/test.yml?query=branch:v0.2.3
[coverage-image]: https://img.shields.io/codecov/c/github/stdlib-js/math-base-special-abs/main.svg
[coverage-url]: https://codecov.io/github/stdlib-js/math-base-special-abs?branch=main
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[chat-url]: https://stdlib.zulipchat.com
[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-abs/tree/deno
[deno-readme]: https://github.com/stdlib-js/math-base-special-abs/blob/deno/README.md
[umd-url]: https://github.com/stdlib-js/math-base-special-abs/tree/umd
[umd-readme]: https://github.com/stdlib-js/math-base-special-abs/blob/umd/README.md
[esm-url]: https://github.com/stdlib-js/math-base-special-abs/tree/esm
[esm-readme]: https://github.com/stdlib-js/math-base-special-abs/blob/esm/README.md
[branches-url]: https://github.com/stdlib-js/math-base-special-abs/blob/main/branches.md
[stdlib-license]: https://raw.githubusercontent.com/stdlib-js/math-base-special-abs/main/LICENSE
[absolute-value]: https://en.wikipedia.org/wiki/Absolute_value
[@stdlib/math/base/special/abs2]: https://www.npmjs.com/package/@stdlib/math-base-special-abs2
[@stdlib/math/base/special/absf]: https://www.npmjs.com/package/@stdlib/math-base-special-absf
[@stdlib/math/base/special/labs]: https://www.npmjs.com/package/@stdlib/math-base-special-labs