A 1.2.3 Logic Gates
Logic gates are the components that let a computer act on binary signals rather than only store or move them. Each gate takes one or two binary inputs and produces a single output by one fixed rule. This lesson describes what the seven gates the syllabus names (AND, OR, NOT, NAND, NOR, XOR, XNOR) do, what they are used for inside a computer system, and the part they play in binary computing. Last Updated: 12 Jun 2026...