@stdlib/math-base-special-absf

Absolute Value

Compute the absolute value of a single-precision floating-point number.

The absolute value is defined as

Installation

npm install @stdlib/math-base-special-absf

Usage

var absf = require( '@stdlib/math-base-special-absf' );

absf( x )

Computes the absolute value of a single-precision floating-point number.

var v = absf( -1.0 );
// returns 1.0

v = absf( 2.0 );
// returns 2.0

v = absf( 0.0 );
// returns 0.0

v = absf( -0.0 );
// returns 0.0

v = absf( NaN );
// returns NaN

Examples

var randu = require( '@stdlib/random-base-randu' );
var round = require( '@stdlib/math-base-special-round' );
var absf = require( '@stdlib/math-base-special-absf' );

var rand;
var i;

for ( i = 0; i < 100; i++ ) {
    rand = round( randu() * 100.0 ) - 50.0;
    console.log( 'absf(%d) = %d', rand, absf( rand ) );
}

C APIs

Usage

#include "stdlib/math/base/special/absf.h"

stdlib_base_absf( x )

Computes the squared absolute value of a single-precision floating-point number.

float y = stdlib_base_absf( -5.0f );
// returns 5.0f

The function accepts the following arguments:

• x: [in] float input value.

float stdlib_base_absf( const float x );

Examples

#include "stdlib/math/base/special/absf.h"
#include <stdio.h>

int main() {
    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_absf( x[ i ] );
        printf( "|%f| = %f\n", x[ i ], y );
    }
}

See Also

• @stdlib/math/base/special/abs: compute the absolute value of a double-precision floating-point number.
• @stdlib/math/base/special/abs2f: compute the squared absolute value of a single-precision floating-point number.
• @stdlib/math/base/special/labs: compute an absolute value of a signed 32-bit integer.

Notice

This package is part of 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, see the main project repository.

Community

License

See LICENSE.

Copyright

Copyright © 2016-2022. The Stdlib Authors.