phpjs/_octopress/source/functions/abs/index.markdown

php.js offers community built php functions in javascript

---
layout: page
title: "JavaScript abs function"
comments: true
sharing: true
footer: true
alias:
- /functions/view/abs:300
- /functions/view/abs
- /functions/view/300
- /functions/abs:300
- /functions/300
---
<!-- Generated by Rakefile:build -->
A JavaScript equivalent of PHP's abs

{% codeblock math/abs.js lang:js https://raw.github.com/kvz/phpjs/master/functions/math/abs.js raw on github %}
function abs (mixed_number) {
  // From: http://phpjs.org/functions
  // +   original by: Waldo Malqui Silva
  // +   improved by: Karol Kowalski
  // +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
  // +   improved by: Jonas Raoni Soares Silva (http://www.jsfromhell.com)
  // *     example 1: abs(4.2);
  // *     returns 1: 4.2
  // *     example 2: abs(-4.2);
  // *     returns 2: 4.2
  // *     example 3: abs(-5);
  // *     returns 3: 5
  // *     example 4: abs('_argos');
  // *     returns 4: 0
  return Math.abs(mixed_number) || 0;
}
{% endcodeblock %}

 - [Raw function on GitHub](https://github.com/kvz/phpjs/blob/master/functions/math/abs.js)

Please note that php.js uses JavaScript objects as substitutes for PHP arrays, they are 
the closest match to this hashtable-like data structure. 

Please also note that php.js offers community built functions and goes by the 
[McDonald's Theory](https://medium.com/what-i-learned-building/9216e1c9da7d). We'll put online 
functions that are far from perfect, in the hopes to spark better contributions. 
Do you have one? Then please just: 

 - [Edit on GitHub](https://github.com/kvz/phpjs/edit/master/functions/math/abs.js)

### Example 1
This code
{% codeblock lang:js example %}
abs(4.2);
{% endcodeblock %}

Should return
{% codeblock lang:js returns %}
4.2
{% endcodeblock %}

### Example 2
This code
{% codeblock lang:js example %}
abs(-4.2);
{% endcodeblock %}

Should return
{% codeblock lang:js returns %}
4.2
{% endcodeblock %}

### Example 3
This code
{% codeblock lang:js example %}
abs(-5);
{% endcodeblock %}

Should return
{% codeblock lang:js returns %}
5
{% endcodeblock %}


### Other PHP functions in the math extension
{% render_partial _includes/custom/math.html %}