copapy.sign# copapy.sign(x)# Return 1 for positive numbers and -1 for negative numbers. For an input of 0 the return value is 0. Parameters: x (TypeVar(U, int, float) | value[TypeVar(U, int, float)] | vector[TypeVar(U, int, float)]) – Input value Return type: Any Returns: -1, 0 or 1