Area of square

Write a program to find the area of the square. 

Example 1:

Input: 4
Output: 16

Example 2:

Input: 4.5
Output:20.25

Approach: Given side of the square. 

Area is side*side

Java

public class AreaofSquare {
    public static void main(String[] args) {
        double side = 4;
        double area = areaSquare(side);
        System.out.println("Area of square is " + area);
    }

    private static double areaSquare(double side) {
        // area=a*a
        return side * side;
    }
}

C++

#include <bits/stdc++.h>
using namespace std;
//function to find the
//area of square
double areaSquare(double side)
{
    //area=a*a
    return side*side;
}
int main()
{
    double side=4;
    double area=areaSquare(side);
    cout<<"Area of square is ";
    cout<<area<<"\n";
    return 0;
}


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