===== Absolute value =====

==== abs( a ) ====

Returns the absolute value of a.

=== Description ===

<code>abs( a )</code>

Returns %%|%%a%%|%%

=== Parameters ===

| ''a'' | Value |

=== Return value ===

This function returns the absolute value of a.

=== Example usage ===

<code>abs( -123 )</code>

Returns 123.