Primitive Datatypes

Primitive datatypes are the simple building blocks.

Each one holds a single basic value.

Think of loose stickers. One sticker per value.

String

A string is text.

Wrap it in quotes.

Number

A number can be whole or with a decimal.

JavaScript uses one number type for both.

Boolean

A boolean is only true or false.

It is a tiny yes or no switch.

Undefined

Undefined means a box exists but nothing was put in yet.

JavaScript gives this starter value.

Null

Null means empty on purpose.

You chose to put nothing there.

Note: typeof null says object. That is an old quirk.

Symbol and BigInt

Symbol makes a unique tag.

BigInt holds very big whole numbers.

Tip: Master string, number, boolean, null, and undefined first. The rest show up later when you need them.