Area of circle in C language

C program for area of circle

          Hello friends, in this blog we see the c 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 = 3.14 * radius * radius.

In this formula, the value of is in float i.e. 3.14, so we are using float datatype and for store fractional value we use %f. By using the following program we find the area of the circle.

C language code for Area of Circle:

#include<stdio.h>

#include<conio.h>

void main()

{

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

   printf("\nEnter the radius of Circle : ");

           //take input from the user

   scanf("%f", &radius);

      /* to store the floating number,

       &radius is used to store the number in radius variable*/

   area = 3.14 * radius * radius;

    // formula and answer store in area variable

   printf("\nArea of Circle : %f  sq.unit", 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