Absolute Value
Compute the absolute value of a double-precision floating-point number.
Installation
npm install @stdlib/math-base-special-abs
Usage
var abs = require( '@stdlib/math-base-special-abs' );
abs( x )
Computes the absolute value of a double-precision floating-point number.
var v = abs( -1.0 );
v = abs( 2.0 );
v = abs( 0.0 );
v = abs( -0.0 );
v = abs( NaN );
Examples
var randu = require( '@stdlib/random-base-randu' );
var round = require( '@stdlib/math-base-special-round' );
var abs = require( '@stdlib/math-base-special-abs' );
var rand;
var i;
for ( i = 0; i < 100; i++ ) {
rand = round( randu() * 100.0 ) - 50.0;
console.log( 'abs(%d) = %d', rand, abs( rand ) );
}
C APIs
Installation
npm install @stdlib/math-base-special-abs
Usage
#include "stdlib/math/base/special/abs.h"
stdlib_base_abs( x )
Computes the absolute value of a double-precision floating-point number.
double y = stdlib_base_abs( -5.0 );
The function accepts the following arguments:
- x:
[in] double
input value.
double stdlib_base_abs( const double x );
Examples
#include "stdlib/math/base/special/abs.h"
#include <stdio.h>
int main() {
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 );
}
}
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.
License
See LICENSE.
Copyright
Copyright © 2016-2021. The Stdlib Authors.