# Java Program to Calculate the Area of a Circle

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

### Area of a Circle

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

Area of a Circle, A = π r², where, π (pie) is equal to the fraction 22/7 and r stands for radius.

Now, let’s see the Java Program to Calculate the Area of a Circle.

## Java Program to Calculate the Area 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 : ");

System.out.println("Area of the Circle is "+ area +" sq. units");

}

}```

Output

``````Enter the radius of the circle : 7

Area of the Circle is 154.0 sq. units

Enter the radius of the circle : 10

Area of the Circle is 314.2857 sq. 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 area = (22.0f/7.0f) * radius * radius;`

Then, we calculated the area of the circle using the formula, i.e. Area of a Circle, A = π r², where, π (pie) is equal to the fraction 22/7 and r stands for radius and we stored it in the variable named area of float datatype because pie is a decimal value.

`System.out.println("Area of the Circle is "+ area +" sq. units");`

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