D.2.2.3 absValue

Procedure from library general.lib (see general_lib).

Usage:

absValue(c); c int, number or poly

Return:

absValue(c); the absolute value of c

Note:

absValue(c)=c if c>=0; absValue=-c if c<=0.
So the function can be applied to any type, for which comparison
operators are defined.

Example:

LIB "general.lib";
ring r1 = 0,x,dp;
absValue(-2002);
→ 2002
poly f=-4;
absValue(f);
→ 4

See also: boolean expressions.