C++ - Booleans

Overview

Estimated time: 20–30 minutes

Use bool for true/false values, build boolean expressions, and understand how integers convert to bool.

Learning Objectives

• Declare and evaluate boolean expressions.
• Understand implicit conversions between integers and bool.

Prerequisites

• C++ - Math

Examples

bool a = true; bool b = false;
bool c = (3 < 5);   // true
bool d = (5 == 0);  // false
bool e = 42;        // true (non-zero)
bool f = 0;         // false

Common Pitfalls

• Using assignment (=) instead of comparison (==) inside conditions.
• Relying on implementation-defined sizes of bool; use it as a logical type.