NOT (Primitive Spread Function) reverses the logical value of its argument.

SYNTAX:

NOT(value)

REMARKS:

If the specified value is zero, then the function returns 1 (True). If the specified value is a value other than zero, then the function returns zero (False). Provide a numeric or logical value for the value argument. 

EXAMPLES:

NOT(A3)
NOT(12) = 0 (False)