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JavaScript Boolean Reference - GeeksforGeeks

JavaScript Boolean Reference

Last Updated : 12 Jul, 2025

JavaScript Boolean is a datatype that returns either true or false In JavaScript, a boolean is used as a function to get the value of a variable, object, conditions, expressions, etc in terms of true or false

Syntax:

Boolean(variable/expression)

Example: If the operands are equal, the equal to operator == returns true

JavaScript


     console.log(15 == 15)
    console.log(15 == 11)

The complete list of JavaScript Boolean has listed below:

JavaScript Boolean Constructor: A constructor gets called when an object is created using the new keyword.

Constructor Descriptions Boolean() Create Boolean objects or return primitive values of type boolean.

JavaScript Boolean Properties: A JavaScript property is a member of an object that associates a key with a value.

Instance Property: An instance property is a property that has a new copy for every new instance of the class.

Instance Properties Descriptions constructor Add a new property and methods to all Boolean instances.

JavaScript Boolean Methods: Methods are actions that can be performed on objects.

Instance Method: If the method is called on an instance of a boolean then it is called an instance method.

Instance Methods Descriptions valueOf() Returns the value of boolean object. toString() Returns a string according to the Boolean value.

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