Here is the formula to calculate circumference of a circle2 π r OR π dWhere r is the Radius of a Circle and d is the Diameter of a Circle...For example : Let the Radius of a Circle be 5cmSo, Circumference of a circle = 2 x 3.141592 x 5i.e., 31.41592 cm
Here is a Program to Calculate Circumference of a Circle...