From David Bolton,
Your Guide to C / C++ / C#.
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Definition: Bool is a fundamental type in C, C++ and C# languages.

Variables of this type can only take two values- 1 and 0. In C++ these correspond to true and false and can be used interchangably. In C# bool variables can only use true and false, they are not interchangeable with 1 and 0.

Boolean variables can be packed together to save memory space. An understanding of binary can be a useful skill.

Note Because of the way false and 0 are usually treated the same (except in C#), any non zero value is the same as true, not just 1.

Glossary:

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Also Known As: Boolean

Examples: Using a bool and checking for true/false improves readability of your program