NOR(argumentlist)

Description
This function returns 0 if any argument is 1; 1 if all arguments are 0; otherwise -1 (unknown).

Parameters
argumentlist
Any combination of numbers, cells, or ranges

Example
A1 = 1, B1 = 1, C1 = 0, D1 = 0, E1 = 1 and A2 = 24
NOR(C1, D1) = 1

NOR(A1..E1) = 0

NOR(A1..A2) = -1