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First function

Created by Julien Palard

Instructions

Write a function computing the perimeter of a circle given its radius.

First read the function tutorial.

Your function should be named circle_perimeter(radius), where the radius parameter is the radius of a cirle.

Your function should return the perimeter of a circle of the given radius.

To test it, we will import your function and try it with different values, such as:

>>> from solution import circle_perimeter

>>> circle_perimeter(1)
6.283185307179586
>>> circle_perimeter(10)
62.83185307179586
>>> circle_perimeter(100)
628.3185307179587

Hints

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