In JavaScript, a boolean value is one that can either be TRUE or FALSE. If you need to know “yes” or “no” about something, then you would want to use the boolean function. It sounds extremely simple, but booleans are used all the time in JavaScript programming, and they are extremely useful.

What is a Boolean in JavaScript?

The Javascript standard defines true and false values as a unique data type called a Javascript boolean. Javascript booleans may be true , false , or (in certain contexts) a value that evaluates to either true or false .

What exactly is a Boolean?

A Boolean expression is a logical statement that is either TRUE or FALSE . Boolean expressions can compare data of any type as long as both parts of the expression have the same basic data type. … BOOLEAN values ( YES and NO , and their synonyms, ON and OFF , and TRUE and FALSE ) BOOLEAN variables or formulas.