Or
  

Returns logical value: 1(True) or 0(False).

syntax
Or(number1;number2;[number3;...])

insert
logical value: 1 or 0.

returns
1(True) when at least one of numbers is 1
0(False) when all numbers are 0

example
Or(1;0;0;0;0) = 1
Or(0;0;0;0;0;0) = 0
Or(2>1;1>2) = 1
Or(2<=1;3<2) = 0
If(Or(2<=1;3<2);10;20) = 20