WRITE A PROGRAM to find area of a circle using PI as constant
#include<stdio.h>
#include<conio.h>
#define PI 3.141
int main()
{
float radius, area;
printf("Enter radius of circle\n");
scanf("%f", & radius);
area = PI * radius * radius;
printf("Area of circle : %0.4f\n", area);
getch();
return 0;
}
Output