Python Program to swap the First and the Last Character of a string

Python Program to swap the First and the Last Character of a string

Let's create a tutorial on how to swap the first and last character of a string in Python.

Objective: Given a string, swap its first and last characters.

Example:

Input String: "python" Output String: "nythop"

Step-by-step Solution:

Step 1: Define the input string.

input_str = "python"

Step 2: Define a function to swap the first and last characters of a string.

def swap_first_last(s): # If the string is empty or only contains a single character, return it as it is. if len(s) <= 1: return s # Get the first and last characters first_char = s[0] last_char = s[-1] # Swap the first and last characters and return the new string return last_char + s[1:-1] + first_char

Step 3: Use the function to get the result.

result_str = swap_first_last(input_str)

Step 4: Display the result.

print(result_str)

Complete Program:

def swap_first_last(s): # If the string is empty or only contains a single character, return it as it is. if len(s) <= 1: return s # Get the first and last characters first_char = s[0] last_char = s[-1] # Swap the first and last characters and return the new string return last_char + s[1:-1] + first_char # Define the input string input_str = "python" # Get the string with swapped first and last characters result_str = swap_first_last(input_str) # Display the result print(result_str)

Output:

nythop

This tutorial provides a clear and efficient way to swap the first and last characters of a string in Python. The swap_first_last function is straightforward and handles edge cases where the string might be empty or contain only a single character.

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