The type stamp

score=250

Now: let's lock the TYPE this box accepts.

Step 1 / 9idle

Watch the stamp slam onto the box. From now on, only this kind of value belongs.

The stamp tells the box: this is a number box. No words. No yes/no. Just numbers.

**Programmers call this stamp a *data type* — or just type** for short.

So when you hear the word type in code, picture this stamp on the box.

Some types are strict — they refuse anything that does not match.

Some boxes have no type — they accept any kind of value.

A typed box is easier to trust — you always know what is inside.

You will sometimes hear this called type safety — it just means the box and its contents always match.

From here on, the words stamp and type mean the same thing — one paints the picture, the other is the real word.

Check yourself

Match the pairs

Match each box to the **data type** it should wear:

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