# JavaScript Boolean Reference

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## JavaScript Booleans

JavaScript booleans can have one of two values: true or false.

## The Boolean() Function

You can use the Boolean() function to find out if an expression is true:

## Example

Boolean(10 > 9) // returns true
Try it Yourself »

Or even easier:

## Example

(10 > 9) // also returns true
10 > 9 // also returns true
Try it Yourself »

For a tutorial about booleans, read our JavaScript Boolean Tutorial.

## Boolean Properties

Property | Description
--- | ---
constructor | Returns the function that created JavaScript's Boolean prototype
prototype | Allows you to add properties and methods to the Boolean prototype

## Boolean Methods

Method | Description
--- | ---
toString() | Converts a boolean value to a string, and returns the result
valueOf() | Returns the primitive value of a boolean

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