Circle Circumference Calculator

Write a function that returns the circumference of a circle given its radius.

math function basics

Write a function `circle_circumference(radius)` that takes a non-negative number `radius` (float or int) and returns the circumference of a circle with that radius. Use the formula: `circumference = 2 * pi * radius`. You may use `math.pi` from the standard library. The returned value should be a float. For example, `circle_circumference(1)` should return approximately `6.283185307179586`.

Constraints

The input `radius` is a non-negative number (int or float). The function must return a float. The result should be accurate to at least 10 decimal places.

Example

```python
>>> circle_circumference(1)
6.283185307179586
>>> circle_circumference(0)
0.0
>>> circle_circumference(2.5)
15.707963267948966
```

10 points ~10 min

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Hints

Import the math module to get pi.

Use the formula: twice the product of pi and radius.

Ensure the result is a float, even if radius is an integer.

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