time-to-botec/squiggle/node_modules/@stdlib/math/base/utils/absolute-difference/README.md

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@license Apache-2.0
Copyright (c) 2018 The Stdlib Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
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# Absolute Difference
> Compute the [absolute difference][absolute-difference] of two real numbers.
<section class="intro">
The [absolute difference][absolute-difference] of two real `numbers` is defined as the absolute value of their difference.
<!-- <equation class="equation" label="eq:absolute_difference" align="center" raw="|\Delta| = | x - y |" alt="Absolute difference"> -->
<div class="equation" align="center" data-raw-text="|\Delta| = | x - y |" data-equation="eq:absolute_difference">
<img src="https://cdn.jsdelivr.net/gh/stdlib-js/stdlib@bb29798906e119fcb2af99e94b60407a270c9b32/lib/node_modules/@stdlib/math/base/utils/absolute-difference/docs/img/equation_absolute_difference.svg" alt="Absolute difference">
<br>
</div>
<!-- </equation> -->
</section>
<!-- /.intro -->
<section class="usage">
## Usage
```javascript
var absdiff = require( '@stdlib/math/base/utils/absolute-difference' );
```
#### absdiff( x, y )
Computes the [absolute difference][absolute-difference] of two real numbers.
```javascript
var d = absdiff( 2.0, 5.0 );
// returns 3.0
d = absdiff( -1.0, 3.14 );
// returns ~4.14
d = absdiff( 10.1, -2.05 );
// returns ~12.15
d = absdiff( -0.0, 0.0 );
// returns +0.0
d = absdiff( NaN, 5.0 );
// returns NaN
d = absdiff( 5.0, NaN );
// returns NaN
d = absdiff( Infinity, Infinity );
// returns NaN
d = absdiff( -Infinity, -Infinity );
// returns NaN
d = absdiff( Infinity, -Infinity );
// returns Infinity
d = absdiff( -Infinity, Infinity );
// returns Infinity
```
</section>
<!-- /.usage -->
<section class="examples">
## Examples
<!-- eslint no-undef: "error" -->
```javascript
var randu = require( '@stdlib/random/base/randu' );
var absdiff = require( '@stdlib/math/base/utils/absolute-difference' );
var x;
var y;
var d;
var i;
for ( i = 0; i < 100; i++ ) {
x = (randu()*1.0e4) - 1.0e2;
y = (randu()*1.0e4) - 1.0e2;
d = absdiff( x, y );
console.log( 'x = %d. y = %d. |x-y| = %d.', x, y, d );
}
```
</section>
<!-- /.examples -->
<section class="links">
[absolute-difference]: https://en.wikipedia.org/wiki/Absolute_difference
</section>
<!-- /.links -->