Overview
This lecture introduces C++ Boolean data types, how to declare boolean variables, and how their values are represented in C++.
Introduction to C++ Booleans
- In programming, a data type is often needed that can have one of two values, such as true/false or yes/no.
- C++ provides the
bool data type for this purpose, which can be true (1) or false (0).
Declaring and Using Boolean Variables
- A Boolean variable is declared using the
bool keyword.
- Example:
bool isCodingFun = true; and bool isFishTasty = false;.
- Outputting these variables with
cout displays 1 for true and 0 for false.
Boolean Values and Output
- The value
true is internally represented as 1, and false is represented as 0.
- It is common to obtain Boolean values by comparing variables and values.
Key Terms & Definitions
- bool — A C++ data type that holds values
true or false.
- Boolean variable — A variable declared with the
bool type.
- true — Represents logical value 1 in C++.
- false — Represents logical value 0 in C++.
Action Items / Next Steps
- Practice declaring and printing boolean variables in C++.
- Learn about Boolean expressions and comparisons in the next lesson.