How to Swap Numbers in Python Without a Temporary Variable in Python

Submitted by razormist on Saturday, September 6, 2025 - 23:43.

In this tutorial, we will learn how to program "How to Swap Numbers in Python Without a Temporary Variable in Python" The objective is to swap between two number without any temporary variable. This tutorial will guide you step by step through the process of swapping two numbers without an ease. By the end of this tutorial, you will have a solid understanding of how to implement this task effectively in Python, helping you strengthen your problem-solving abilities and improve your coding skills.

This topic is straightforward to understand. Simply follow the instructions provided, and you will complete it with ease. The program will guide you step by step through the process of swapping two numbers. So, let’s dive into the coding process!

Getting Started:

First you will have to download & install the Python IDLE's, here's the link for the Integrated Development And Learning Environment for Python https://www.python.org/downloads/.

Creating Main Function

This is the main function of the application. The following code will display a simple GUI in terminal console that will display program. To do this, simply copy and paste these blocks of code into the IDLE text editor.

while True:
    print("\n============= Swap Numbers in Python Without a Temporary Variable =============\n")
 
    try:
        a = int(input("Enter value of first variable: "))
        b = int(input("Enter value of second variable: "))
 
        print(f"Before swapping: a = {a}, b = {b}")
 
        # Swap without using a temporary variable
        a = a + b
        b = a - b
        a = a - b
 
        print(f"After swapping:  a = {a}, b = {b}")
 
    except ValueError:
        print("Invalid input. Please enter integers only.")
        continue
 
    opt = input("\nDo you want to try again? (yes/no): ").strip().lower()
    if opt == 'no':
        print("Exiting program...")
        break
    elif opt != 'yes':
        print("Invalid choice. Exiting program...")
        break

This Python program swaps two numbers without using a temporary variable. It prompts the user for two integers, displays their values before swapping, and then performs the swap using arithmetic operations: first adding the two numbers and storing the result in `a`, then updating `b` as the difference (`a - b`), and finally updating `a` as the new difference (`a - b`). The swapped values are displayed afterward. The program includes error handling for invalid input (non-integers) and allows the user to repeat the process or exit.

Output:

There you have it we successfully created How to Swap Numbers in Python Without a Temporary Variable in Python. I hope that this simple tutorial help you to what you are looking for. For more updates and tutorials just kindly visit this site. Enjoy Coding!

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