---
title: in_range
tags: math,beginner
---

Checks if the given number falls within the given range.

Use arithmetic comparison to check if the given number is in the specified range.
If the second parameter, `end`, is not specified, the range is considered to be from `0` to `start`.

```py
def in_range(n, start, end = 0):
  if (start > end):
    end, start = start, end
  return start <= n <= end
```

```py
in_range(3, 2, 5); # True
in_range(3, 4); # True
in_range(2, 3, 5); # False
in_range(3, 2); # False
```