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 = Ï€ rÂ²**, where,

**(pie) is equal to the fraction**

**Ï€****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 : "); float radius = sc.nextFloat(); float area = (22.0f/7.0f) * radius * radius; 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 ?**

**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 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 = Ï€ rÂ²**, where,

**(pie) is equal to the fraction**

**Ï€****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

function to print in Java. This is the **System.out.println()****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.**

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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