Question

Write a program to calculate area and perimeter of circle after obtaining

radius r from use​

Answer 1

Answer:

#include <stdio.h>

int main() {

int radius;

float area, perimeter;

radius = 6;

perimeter = 2*3.14*radius;

printf("Perimeter of the Circle = %f inches\n", perimeter);

area = 3.14*radius*radius;

printf("Area of the Circle = %f square inches\n", area);

return(0);

}

Answer 2

Following is the program in JAVA language to calculate the area and perimeter of the circle with radius 'r'.

import java.util.Scanner;

public class circle {

   public static void main(String[] args) {

       Scanner sc = new Scanner(System.in);

       System.out.println("Enter the radius of the circle: ");

       int r = sc.nextInt();

       // Let, 'P' be the perimeter of the circle.

       float p = (float) (2*3.14*r);

      // Let, 'A' be the area of the circle.

       float A = (float) (3.14*r*r);

       System.out.println("The Perimeter of the Circle is:" + p+ " units.");

       System.out.println("The Area of the circle is:" + A + " square units.");

   }

}

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