area of circle circumference code example

Example 1: how to find circumference of a circle

curcomfrance = pi * radius * 2

Example 2: area of circle

Area of circle = Pi * r^2 (r stands for radius and ^2 means squared)

Example 3: circumference of circle

C = Pi * r * 2 (r stands for radius)

Or you could do this:
C = Pi * d (d stands for diameter)