Description
Get the value for radius from the user and calculate the area of the circle for the given radius.
Area of circle = 3.14*radius*radius
Input
3
Output
28.26
C Program
#include <stdio.h>
int main()
{
float area,radius;
printf(“Enter the radius”);
scanf("%f",&radius);
area=3.14*radius*radius;
printf("%0.2f",area);
return 0;
}
C++ Program
#include <iostream>
using namespace std;
int main()
{
float area,radius;
cout<<"Enter the radius: ";
cin>>radius;
area=3.14*radius*radius;
cout<<area;
return 0;
}
Java
import java.util.Scanner;
public class Main
{
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.print("Enter the radius: ");
float radius = sc.nextFloat();
double area = 3.14 * radius * radius;
System.out.println(area);
}
}
Python
Method 1
radius=float(input("Enter the radius: "))
area=3.14*radius*radius
print(area)
Method 2
from math import pi
radius=float(input("Enter the radius: "))
area=pi*radius*radius
print(area)