# bool

*noun*

say it: **“BOOL”** **/buːl/**

The C# type for a value that is either true or false.

## What is **bool** in C#?

**bool** — The C# type for a value that is either `true` or `false`. Comparisons give you a bool, and `if` statements and loops decide what to do with one.

```csharp
bool isInStock = true;
bool isExpensive = 24.50m > 20m;
Console.WriteLine(isExpensive); // True
```

## In a sentence

- “I stored whether the book was in stock in a **bool** called isInStock.”

Level: Novice · [More C# terms at this level](https://www.ask-codey.com/glossary?category=c-sharp&level=1)

Updated: October 28, 2026

Source: https://www.ask-codey.com/glossary/bool