ABS absolute value
SQR square = X^2 = X*X
SQRT square root
SIGN sign of X; =1 for X>0, =0 for X=0, =-1 for X<0
ZERO =0 for X=0, =1 for X<>0
TRUNC=INT integer part
FRAC fractional part
ROUND rounds X to the nearest integer value
CEIL always returns "ceil" integer value
FLOOR always returns "floor" integer value
DEC decrements a value X by 1 and returns a new value
INC increments a value X by 1 and returns a new value
ARG argument(phase) of X and Y
RADIUS = sqrt(sqr(X)+sqr(Y))
POWER raises X to a power of Y (Y is a floating point value)
IPOWER raises X to a power of Y (Y is a integer value)
X ^ Y raises X to a power of Y (same as above two functions)