Question

define signum function

Answer 1

The sign of a real number, also called sgn or signum, is -1 for a negative number (i.e., one with a minus sign "), 0 for the number zero, or +1 for a positive number (i.e., one with a plus sign"). In other words, for any real x

Answer 2

Signum function Is an odd Mathematical function that extracts the sign of real number .