At this point you've covered fewer than half of the core objects you will need to know about to be confident in JavaScript. Now you're going to spend some time looking at some of the other global objects that you haven't covered, specifically the `Boolean`

object (a vehicle for `true`

and `false`

values), the `Number`

object, and the `Math`

object.

Like the `String`

object, the `Boolean`

and `Number`

objects are at the same time primitives as well as objects. They are simultaneously a *value* as well as a collection of tools for dealing with those data types. As with strings, the distinction is subtle and rarely comes up in practice. However, if you're doing any complex work with these objects, it's worth knowing the difference. Later I'll be talking about the `Math`

object too, which is useful for working with numbers. If you're not confident with math concepts, don't worry — the `Math`

object is nothing to fear. It's mainly a basic collection of static utility functions and mathematical constants found in most programming languages. You'll be surprised how often you end up using `Math`

, usually to do something simple like round off decimals to the nearest whole number, or choose the highest value between a set of values.

One of the simplest data types is the primitive boolean value, which can be equal one of two values: `true`

, or `false`

. Whether you know it or not, you're constantly working with boolean values. Whenever you use an `if`

statement, ...

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