Given a radius of the circle, write a java program to calculate and display the area of the circle. (Take ∏=3.142)

**Example**

Input: radius= 5Output: Area of circle is : 78.55Input: radius= 8Output: Area of circle is : 201.08

As we know to calculate the area of a circle, the radius of the circle must be known, so if the radius of the circle is known, then the area of the circle can be calculated by using the formula:

Area = 3.142*(radius)*(radius)

Below is the Java Program to calculate the area of the circle:-

## Java

`// Java program to calculate the area of the` `public` `class` `GFG {` ` ` `public` `static` `void` `main(String[] args)` ` ` `{` ` ` `int` `radius;` ` ` `double` `pi = ` `3.142` `, area;` ` ` `radius = ` `5` `;` ` ` `// calculating the area of the circle` ` ` `area = pi * radius * radius;` ` ` `// printing the area of the circle` ` ` `System.out.println(` `"Area of circle is :"` `+ area);` ` ` `}` `}` |

**Output**

Area of circle is :78.55

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