This is documentation for Mathematica 6, which was
based on an earlier version of the Wolfram Language.
 Numerical Functions Throughout Mathematica there is support not only for approximate real numbers, but also for exact numbers represented in algebraic or symbolic form. Functions like Floor, IntegerPart and Max are all in effect set up to "prove theorems"—often using original algorithms developed at Wolfram Research—to give values with exact inputs.      Min, Max — minimum or maximum of numbers or lists Abs — absolute value Sign — sign (-1, 0, +1)      Clip — clip to between -1 and +1 or other limits Rescale — rescale to run between 0 and 1 Chop — chop small values to 0      Unitize — 0 for x=0, and 1 otherwise UnitStep — 0 for x<0, and 1 for x≥0 Piecewise — general piecewise function Boole — 1 for True, 0 for False      Less (<)  ▪ Greater (>)  ▪ LessEqual (<=)  ▪ GreaterEqual (>=)      IntegerQ — test whether an expression is an integer TUTORIALS Numerical Functions MORE ABOUT Complex Numbers Integer Functions Representation of Numbers RELATED LINKS Demonstrations related to Numerical Functions (The Wolfram Demonstrations Project)