The ABS function returns a floating-point number that equals the  absolute
  value  of  a  specified  numeric expression.  The ABS% function returns an
  integer that equals the absolute value of a specified integer expression.

  Example

  A = ABS(-100 * G)

  A% = ABS%(5% - B%)

1  –  Syntax

      real-var = ABS(real-exp)

      int-var = ABS%(int-exp)