@stdlib/math-base-special-abs

What is @stdlib/math-base-special-abs?

@stdlib/math-base-special-abs is a package that provides a function to compute the absolute value of a number. It is part of the larger @stdlib library, which offers a wide range of mathematical and statistical functions.

What are @stdlib/math-base-special-abs's main functionalities?

Compute Absolute Value

This feature allows you to compute the absolute value of a number. The function takes a single numeric input and returns its absolute value.

const abs = require('@stdlib/math-base-special-abs');

console.log(abs(-5)); // 5
console.log(abs(3.14)); // 3.14
console.log(abs(0)); // 0

Other packages similar to @stdlib/math-base-special-abs

mathjs

mathjs is a comprehensive math library for JavaScript and Node.js. It provides a wide range of mathematical functions, including the ability to compute the absolute value of a number using the `math.abs` function. Compared to @stdlib/math-base-special-abs, mathjs offers a broader set of functionalities beyond just computing absolute values.

lodash

lodash is a popular utility library that provides a variety of functions for common programming tasks, including mathematical operations. The `_.abs` function in lodash can be used to compute the absolute value of a number. While lodash is not specifically focused on mathematical functions, it offers a wide range of utilities that can be useful in many different contexts.

big.js

big.js is a library for arbitrary-precision decimal arithmetic. It includes a method `abs` to compute the absolute value of a Big number. This package is particularly useful when dealing with very large or very precise numbers, which is a different use case compared to @stdlib/math-base-special-abs.

README

Absolute Value

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

The absolute value is defined as

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 );
// 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

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 ) );
}

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C APIs

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 );
// returns 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 );
    }
}

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See Also

• @stdlib/math/base/special/abs2: compute the squared absolute value of a double-precision floating-point number.
• @stdlib/math/base/special/absf: compute the absolute value of a single-precision floating-point number.
• @stdlib/math/base/special/labs: compute an absolute value of a signed 32-bit integer.

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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

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License

See LICENSE.

Copyright

Copyright © 2016-2022. The Stdlib Authors.

Changelog

0.0.6 (2022-02-16)

No changes reported for this release.

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