Area Of Circle
In C language
#include<stdio.h>
int main(){
float r,area;
printf("enter radius of circle: ");
scanf("%f",&r);
area = 3.14*r*r;
printf("area of circle: %f",area);
printf("\narea of circle: %g",area);
}
In C++ language
#include<iostream>
using namespace std;
int main(){
float r,area;
cout<<"enter radius of circle: ";
cin>>r;
area = 3.14*r*r;
cout<<"area of circle: "<<area;
}