Calculate area of a square

C Program

#include <stdio.h>
#include <stdlib.h>
int main()
{
    int a,res;
   printf("Enter length/side of a square:");
   scanf("%d",&a);
   res = a*a;
   printf("Area of the square is: %d",res);
}

Java Program

import java.util.Scanner;

public class SimpleProgram10 {

	public static void main(String[] args) 
	{
		Scanner s = new Scanner(System.in);
		System.out.print("enter length/side of a square:");
		int side = s.nextInt();
		System.out.print("The area of the square is " + (side*side));
	}

}

Python Program

x = int(input("Enter the side of a square: "))
print("The area of the square is : " + str(x*x))