===== Square root ======

==== sqrt( a ) ====

Returns the square root of a.

=== Description ===

<code>sqrt( a )</code>

Returns the square root of the value a.

=== Parameters ===

| ''a'' | Value |

=== Return value ===

This function returns the square root of the value a.

=== Example usage ===

<code>sqrt( 256 )</code>

Returns 16.