Swapnil Kale

Program in C by using '+' and '-' operators:
#include<stdio.h>
int main()
{
int firstNum=10, secondNum=20;
printf("Before Swapping: First Number = %d Second Number = %d",firstNum,secondNum);
firstNum = firstNum + secondNum; //firstNum = 30 (10+20)
secondNum = firstNum - secondNum; //secondNum = 10 (30-20)
firstNum = firstNum - secondNum; //firstNum = 20 (30-10)
printf("\nAfter Swapping: First Number = %d Second Number = %d",firstNum,secondNum);
return 0;
}
-------------------------------------------------
Program in C++ by using '*' and '/' operators:

#include <iostream>
using namespace std;
int main()
{
int firstNum=5, secondNum=10;
cout<<"Before Swapping: First Number = "<<firstNum<<" Second Number = "<<secondNum<<endl;
firstNum = firstNum * secondNum; //firstNum=50 (5*10)
secondNum = firstNum / secondNum; //secondNum=5 (50/10)
firstNum = firstNum / secondNum; //firstNum=10 (50/5)
cout<<"After Swapping: First Number = "<<firstNum<<" Second Number = "<<secondNum<<endl;
return 0;
}
--------------------------------------------------
Program in java by using '+' and '-' operators:

class SwappingDemo {
public static void main(String args[]) {
System.out.println("Before swapping:");
int firstNum = 10;
int secondNum = 20;
System.out.println("value of First Number :" + firstNum);
System.out.println("value of Second Number :" + secondNum);
System.out.println("After swapping:");
firstNum = firstNum + secondNum; //firstNum = 30 (10+20)
secondNum = firstNum - secondNum;
firstNum = firstNum - secondNum;
System.out.println("value of First Number :" + firstNum);
System.out.println("value of Second Number :" + secondNum);
}
}

I like to use the names of the variables as self-descriptive.
So no matter who is reading the code they will understand easily.

Hi Sir,
Firstly and most importantly, don't let him get used to mobile phones or laptops. These must be very helpful in keeping him engaged and make him sit in one place but don't do it.
And what do you mean by sitting in one place? Active kids are always good. But to make him sit at one place, and by that, I mean by making him complete things or games he plays with, you have to sit with him and do the things yourself first. We all know small kids imitate us knowingly or unknowingly. So when he looks at you doing something, he will try and imitate you. Make it fun for him.
I hope this helps. :)