Area of circle in Cpp language

Cpp program for area of circle

          Hello friends, in this blog we see the cpp program for finding the area of the circle. To find the area of the circle we must know the formula for calculating the area of circle i.e. area = pi * radius * radius

          In this formula, the value of pi is in float i.e. 3.14, so we are using float datatype. By using the following program we find the area of the circle.

C language code for Area of Circle:

#include<iostream.h>

#include<conio.h>

void main()

{

   float radius, area;/* to accept floating number*/

   cout<<"\nEnter the radius of Circle : ";

           //take input from the user

   cin>>radius;

      /* to store the floating number,

       

   area = 3.14 * radius * radius;

    // formula and answer store in area variable

   cout<<"\nArea of Circle :"<<area;  // display answer

   getch();

}

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Output:

Enter the radius of Circle:3

Area of Circle:28.26

Enter the radius of Circle:9.54

Area of Circle: 285.776424