Abs (number)   -> positive number
                                                                                    Pg 27-1

Returns the absolute (unsigned, positive) value of number.

If number is negative, it is returned as positive.
If number is positive, it is unchanged.

The following example returns the absolute value of -10.3, which is 10.3:

         vVector:=Abs(-10.3)      ` vVector gets 10.3