# 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.

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.

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 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 : ");

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.
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