EFUN: sqrt

SYNTAX:
float sqrt( x );
  float x;

DESCRIPTION:
Calculates the square root of x. X must have a positive (>0) value.

RETURN VALUE:
The value of sqrt( x ) is returned.

SEE ALSO:
log

EXAMPLE:
float x;

x = sqrt( 9.0 );
// x has now a value of 3.0
