The SIGN function returns +1, 0, or –1 depending on the sign of the argument.

The function type is integer.

argument-1

Must be of class numeric.

The returned value is as follows:

• If the value of argument-1 is greater than zero, the returned value is 1.
• If the value of argument-1 is zero, the returned value is 0.
• If the value of argument-1 is less than zero, the returned value is -1.