What logical operation does an OR gate perform?

The operation of an OR gate is one of the simplest in digital logic. As the name suggests, it produces a high output (a 1) if input A, OR input B, OR both are high. This means that if any input is a 1, the resulting output will be a 1. The only time an OR gate produces a 0 is when all of its inputs are exactly 0. This differs from an Exclusive-OR (XOR) gate, which would output a 0 if both inputs were 1. A standard OR gate is inclusive, meaning multiple 1s at the inputs still yield a 1 at the output.