C# TutorialLesson 14Free preview

C# Booleans

This lesson is part of C# · All levels

Summary

The bool type only stores true or false, and is the result of a comparison expression or condition. Boolean works like a program switch: the value true makes the block code run. Methods on strings such as Contains also produce bool so that it can be used directly in the if condition.

Key points

The bool type has only two values, namely true and false.
A comparison expression like age is greater than 17 produces a bool.
The logic operator and, or, not combining some boolean conditions.
String methods such as Contains, StartsWith, and EndsWith yield bool.
Boolean values can be directly printed, usually appearing as True or False.

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