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JavaScript Boolean Reference

JavaScript Boolean Reference Complete Boolean reference Revised July 2025 Name Description Boolean() Returns a boolean new Boolean() Returns a boolean object constructor Returns the function that created JavaScript's Boolean prototype prototype Allows you to add properties and methods to the Boolean prototype toString() Converts a boolean value to a string, and returns the result valueOf() Returns the primitive value of a boolean Boolean Use Cases

Boolean values are fundamental for logical operations and control flow in JavaScript programming.

Comparisons

All comparison operators (like ==, !=, <, >) return true or false.

Given that x = 5, the table below explains comparison:

Description Example Returns Not equal to (x == 8) false Unequal to (x != 8) true Greater than (x > 8) false Less than (x < 8) true Conditions

Booleans are extensively used in if statements to determine the code blocks to executec.

Example Returns if (day == "Monday") true or false if (salary > 9000) true or false if (age < 18) true or false Loops

Booleans are extensively used in loops to determine conditions for looping.

Description Example For loop for (i = 0; i < 5; i++) While loop while (i < 10) For in loop for (x in person) For of loop for (x of cars)

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