Circumference of a circle is defined as **length of perimeter of circle**. Mathematically, **circumference of a circle having radius r will be 2πr**. Quite simeple, so we need to just code this simple mathematical formula as Python Code.**Python Code for Finding Circumference of Circle**

```
# Calculate circumference of a Circle
# Importing Python's Math Module
import math
# Using value of pie inside math inside
π = math.tau
# Ask user for radius of circle
radius = float(input("Enter radius of circle => "))
# Circumference of circle = 2πr
circumference = 2 * π * radius
# Printing out circumference of circle
print("Circumference of circle is => ", circumference)
```

**Output of Above Code**

```
Enter radius of circle => 5
Circumference of circle is => 62.83185307179586
```