Logical OR Gate

Math

OR logic gate. Output 1 if any input is 1, else 0. Truth table: 0,0→0 | 0,1→1 | 1,0→1 | 1,1→1. Fundamental to digital circuits.

Formula

OR: Output 1 if A=1 OR B=1 (or both)

A=1, B=0

Inputs
  • Input A: 1
  • Input B: 0

Output = 1

Frequently asked questions

How different from AND?
OR: 1 if any input is 1; AND: 1 only if all inputs are 1