## Chaining comparison operators:

```
>>> x = 5
>>> 1 < x < 10
True
>>> 10 < x < 20
False
>>> x < 10 < x*10 < 100
True
>>> 10 > x <= 9
True
>>> 5 == x > 4
True
```

In case you're thinking it's doing `1 < x`

, which comes out as `True`

, and then comparing `True < 10`

, which is also `True`

, then no, that's really not what happens (see the last example.) It's really translating into `1 < x and x < 10`

, and `x < 10 and 10 < x * 10 and x*10 < 100`

, but with less typing and each term is only evaluated once.