In addition to the basic math functions (+, -, /, \*), there are a number of advanced functions. Take note that Number denotes both Integer and Real, and they're substitutive unless otherwise specified.

Operators	Description
Number::abs () : Number	Returns the absolute value of self, self if it is already a positive number.
Number::floor () : Integer	Returns the integer part of self if it is a Real, self if it is an Integer.
Number::max ( r : Number ) : Number	Returns the greatest number between self and *r*.
Number::min ( r : Number ) : Number	Returns the lowest number between self and *r*.
Number::round () : Integer	Returns the nearest integer to self if it is a Real, self if it is an Integer.
Number::ieeereminder(r:Number):Integer	Reminder of division with r, ie modulus or mod or %
Integer::div ( i : Integer ) : Integer	Returns the integer quotient of the division of self by *i*.
Integer::mod ( i : Integer ) : Integer	Returns the integer remainder of the division of self by *i*.

See also: OCLOperators