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C++ Program to Swap Two Numbers

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This is the most basic of swapping two numbers in C++ program. This tutorial provides you with the source code to swap numbers in C++.

There are basically two ways to swap numbers.

  • Using third Variable
  • Without using third variable.

In this section, we will learn using the third variable and in the next section, you will learn without the use of the third variable.

C++ Program to Swap Two Numbers using a Third Variable 

#include <iostream>
using namespace std;

int main()
{
  int num1, num2, temp;

  cout << "Enter num1: ";
  cin >> num1;
  cout << "Enter num2: ";
  cin >> num2;

  temp = num1;
  num1 = num2;
  num2 = temp;

  cout << "\nResult after Swapping Two Numbers:\n";
  cout << "num1: " << num1;
  cout << "\nnum2: " << num2;

  return 0;
}

Output:

Enter num1: 10
Enter num2: 20

Result after Swapping Two Numbers:
num1: 20
num2: 10

The program takes the two numbers from the users as input and swaps those values using a third or temporary variable. Finally, print the result of swapped values.

You may go through the following program in C++:

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