Coding Challenge: Circumference and Area of a Circle

Problem statement

Let’s play with the functions and try to calculate the circumference and area of a circle. Here are some hints for solving this exercise:

• You can use the “$2Πr$” to compute circumference and “Π$r^{2}$” to compute the area of the circle.
• The value of the number π (Pi) is obtained with Math.PI in JavaScript.
• You might want to use the exponentiation operatorUse to raise a number to the power of an exponent. ** to perform computations.

Input

circumference(2);
circumference(12);

area(20);
area(4);

Expected output

12.566370614359172
75.39822368615503

1256.6370614359173
50.26548245743669

Coding exercise