Beyond numbers and text, programs often need to represent simple "yes" or "no" states, like whether a light switch is on or off.

JavaScript has a specific data type for this kind of information.

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Can you think of a situation where you only need a true/false answer?

This data type is called a Boolean, named after George Boole. In JavaScript, the type is called boolean.

A boolean variable can only hold one of two possible values: true or false.

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Why do you think these specific words are used?

It's crucial to remember that true and false must be lowercase in JavaScript. True or False (capitalized) will cause an error.

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How is true different from the string "true"?

Booleans are fundamental for making decisions in code. We often get boolean values by comparing other values.