C Program to Calculate Area of Circle?

Answer 1

#include<stdio.h>

int main() {
   float radius, area;

   printf("\nEnter the radius of Circle : ");
   scanf("%d", &radius);

   area = 3.14 * radius * radius;
   printf("\nArea of Circle : %f", area);

   return (0);
}

Output :

Enter the radius of Circle : 2.0
Area of Circle : 6.14