SIGN num
num
Outputs the sign (-1 if negative, 0 if zero, 1 is positive) of its input. This is handy for when you want to apply the sign of one number to another.
SHOW SIGN 5 1
SHOW SIGN 5
SHOW SIGN 0 0
SHOW SIGN 0
SHOW SIGN -98.6 -1
SHOW SIGN -98.6