Description

To calculate area of a square use formula
  area = side x side

C/C++

/* C Program to calculate area of square */
//Save it as AreaSquare.c

#include<stdio.h>
int main(){

    float side, area;

    printf("Enter side of a square : ");
    scanf("%f",&side);

    area = (side * side);

    printf("The area square : %.3f",area);

    return 0;
}

Input:
Enter side of a square : 25

Output:
The area square : 625.000

Java

/* Java Program to calculate area of square */
//Save it as AreaSquare.java

import java.io.*;
import java.util.Scanner;

public class AreaSquare {

    public static void main(String[] args) {

            Scanner scanner = new Scanner(System.in);
        
            float side, area;

        System.out.println("Enter side of a square : ");
        side = scanner.nextFloat();

        area = (side * side);
        
        System.out.println("The area square : " + area);
    }
}

Input:
Enter side of a square : 
25

Output:
The area square : 625.0

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