OneCompiler

TO FIND AREA AND PERIMETER OF A CIRCLE

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/**

  • @author: BeginnersBook.com
  • @description: Program to calculate area and circumference of circle
  • with user interaction. User will be prompt to enter the radius and
  • the result will be calculated based on the provided radius value.
    /
    import java.util.Scanner;
    class CircleDemo
    {
    static Scanner sc = new Scanner(System.in);
    public static void main(String args[])
    {
    System.out.print("Enter the radius: ");
    /We are storing the entered radius in double
    * because a user can enter radius in decimals
    /
    double radius = sc.nextDouble();
    //Area = PI    radius    radius
    double area = Math.PI * (radius * radius);
    System.out.println("The area of circle is: " + area);
    //Circumference = 2    PIradius
    double circumference= Math.PI * 2    radius;
    System.out.println( "The circumference of the circle is:"+circumference) ;
    }
    }