How to Swap the First and Last Characters of a String in Python
In this tutorial, we will learn how to program "How to Swap the First and Last Characters of a String in Python." The objective is to swap the first and last characters of a given string. This tutorial will guide you through the process step by step, showing you how to perform character swapping within a string. By the end, you will have a clear understanding of how to efficiently complete this task in Python.
This topic is straightforward to understand. Just follow the instructions I provide, and you will complete it with ease. The program I will demonstrate will show you the correct and efficient way to swap the first and last characters of a string. 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.- def change(string):
- return string[-1:] + string[1:-1] + string[:1]
- while True:
- print("\n============== Swap the First and Last Characters of a String ==============\n")
- string=input("Enter string:")
- print("New string:")
- print(change(string))
- opt = input("\nDo you want to try again?(yes/no): ")
- if opt.lower() == 'yes':
- ret=False
- elif opt.lower() == 'no':
- ret=True
- print("Exiting program....")
- else:
- print("Please enter yes/no:")
- break
- if ret == False:
- continue
This Python program continuously prompts the user to input a string and then swaps its first and last characters. The function change(string) performs the swap using string slicing: it takes the last character, then the middle portion (excluding the first and last), and finally the first character. The modified string is printed, and the user is asked whether they want to try again. If "yes" is entered, the process repeats; if "no", the program exits. Any other input breaks the loop with a prompt to enter a valid option.
Output:
There you have it we successfully created How to Swap the First and Last Characters of a String 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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