Lesson 13: Logical operators

Sometimes a decision depends on several conditions together. In C# you combine booleans with symbols: && is 'and' (both must be true), || is 'or' (at least one is true), and ! is 'not' (flips true to false). Note: in C# these are symbols — not the words and/or/not.

&& is like a door needing two keys (both). || is a door any key opens (one is enough). ! flips yes to no.

&& (and): True only if both sides are true.
|| (or): True if at least one side is true.
! (not): Flips true to false and vice versa.
symbols, not words: In C# you use && || ! and not the words and/or/not.