Absolute Value
Compute the absolute value of a single-precision floating-point number.
The absolute value is defined as
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 );
}
}