# Futurebasic/Language/Reference/usr abs

< Futurebasic | Language | Reference

USR ABS(expr)

** Description ** This function returns the absolute value of expr.

The absolute value of a number is its distance from zero: the absolute value of -23 is 23; the absolute value of 16 is 16.

USR ABS is slower than the ABS function, but it is included for backward compatibility.

** See Also ** ABS