Java Program to Calculate Circumference of a Circle

In this post, we will learn to code the Java Program to Calculate Circumference of a Circle. Let’s understand about Circle and the formula to calculate the circumference of a given circle. Then we will learn How to Calculate the Circumference of a Circle in Java Programming Language.

Java Program to Calculate Circumference of Circle

A Circle is defined as the set of points placed at an equal distance from a fixed point in a plane called a center.

Circumference of a Circle

The formula to calculate the circumference of a circle is as follows,

Circumference of a Circle, C = 2 * π * r, where, π (pie) is equal to the fraction 22/7 and r stands for radius.

circumference of circle formula

Now, let’s see theJava Program to Calculate Circumference of a Circle

Java Program to Calculate Circumference of a Circle

import java.util.*;

public class Main{
    
    
    public static void main(String[] args){
        
        Scanner sc = new Scanner(System.in);
        
        System.out.println("Enter the radius of the circle : ");
        float radius = sc.nextFloat();
        
        float circumference = (22.0f/7.0f) * radius * 2;
        
        System.out.println("Circumference of the Circle is "+ circumference +" units");
        
    }
    
}

Output

Enter the radius of the circle : 25
Circumference of the Circle is 157.14285 unit

Enter the radius of the circle : 7
Circumference of the Circle is 44.0 units

How Does This Program Work ?

        Scanner sc = new Scanner(System.in);
        
        System.out.println("Enter the radius of the circle : ");
        float radius = sc.nextFloat();

In this program, we have taken the input of the radius from the user and stored it in the variable radius of datatype float using the Scanner Class in Java.

        float circumference = (22.0f/7.0f) * radius * 2;

Then, we calculated the circumference of the circle using the formula, i.e. Circumference of a Circle, C = 2 * π * r, where, π (pie) is equal to the fraction 22/7 and r stands for radius and we stored it in the variable named circumference of float datatype because pie is a decimal value.

System.out.println("Circumference of the Circle is "+ circumference +" units");

Then, we printed the result using the System.out.println() function to print in Java. This is the Java Program to Calculate Circumference of a Circle.

Read more : Java Program to Calculate the Area of a Circle

Conclusion

I hope after going through this post, you understand how to code Java Program to Calculate Circumference of a Circle.
If you have any doubt regarding the topic, feel free to contact us in the Comment Section. We will be delighted to help you.

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