Problem
Calculating the Circumference of a Circle
Your younger brother is studying beginning geometry. He has to calculate the circumference of several different circles and would like to automate the process. Write a stand-alone application for him that calculates the circumference of a circle from the radius. The radius will be an integer value input from the keyboard. Create a method that will accept the integer and perform the calculation using the formula, 2*pi*r - that is, 2 times the value of pi times the radius. Use the value 3.14 or the Java variable, Math.PI, in your calculation.