if
expression function
Returns the value of the second or third argument depending on the truth of the first argument.
See also: ifs
Usage
if(expression, true_value, false_value)
Note
This is a function, which means all parameters to the function are evaluated. So something like if($F > 1, system('echo 1'), system('echo 2')) will result in both system calls being run regardless of the result of the expression.
Examples
if ($F<12, $F, 75)
When the current frame number ($F) is less than 12, returns the current frame number, otherwise returns 75.