I tried to use the “import math” in my code, but it is saying it is unused. Could anyone help me please? I am on python.

Hey @ArnavGupta113, welcome to the forums!

Yes, that is intended behavior as you have not used it yet. It is not an error, it’s a warning. You can tell because it’s orange.

I want to use pi, but even when I do it it still has an orange line under it.

Try refreshing. If you’ve used the `math`

library and it still says that you haven’t used it, then refreshing should fix it.

@ArnavGupta113 you have to use `math.pi`

if you haven’t. Alone you can’t use `pi`

because it is part of the module `math`

.

As @SalladShooter says, you need to use `math.pi`

instead of just `pi`

. There is also a typo in your `raduius`

variable name.

For anyone who is wondering, this is the OP’s current code:

https://replit.com/@ArnavGupta113#main.py

```
import math
radius = 4
area = pi * raduius # Change to math.pi * radius
```

Another solution would be to import `pi`

on its own if you do not plan to use any other `math`

components. This would allow you to use just `pi`

instead of `math.pi`

in your equation.

```
from math import pi
radius = 4
area = pi * radius
```

Also area of a circle should be calculated by pi*(R**2) not pi*R, keep that in mind

Order of operations?

Not sure what you mean, but exponential operations (or `**`

in this case) come before anything else (excluding parentheses, which are not needed in this case.) `area = math.pi * radius ** 2`

Brackets are optional, but the code reads better with them (for me personally).