Program 13: Reverse a String - 1000+ Python Programs

What is Reversing a String?

Reversing a string means reversing the order of characters in a given string.

For example, if we reverse the string "Hello", we get "olleH"

Pseudo Logic

To reverse a string in Python, follow these steps to build your logic:

1. Create a method named reverse_string(input_string) that takes in a input_string argument.
2. Initialize an empty String variable say reversed_string.

3. Iterate through each character using a for loop of the input string in reverse order.

4. Now append each character to the reversed_string variable.

5. Return the reversed_string variable.

Python Reverse String Program

#
# Program 13: String Reversal
# 1000+ Python Programs by Code2care.org
#

def reverse_string(input_string):
    """
    Args:
        input_string (str): The string to be reversed.

    Returns:
        str: The reversed string.
    """
    reversed_string = ''
    # Iterate through each character of the input string in reverse order
    for i in range(len(input_string) - 1, -1, -1):
        # Append each character to the reversed_string variable
        reversed_string += input_string[i]
    # Return the reversed string
    return reversed_string

# Let's try a few examples
print(reverse_string("John"))
print(reverse_string("Stephen"))
print(reverse_string("Andrew"))
print(reverse_string("Harry"))

Output:

nhoJ
nehpetS
werdnA
yrraH

String Reversal using Python Built-in Method

The built-in reversed() function that can be used to reverse a String.

input_str = "Voldomort"
reversed_str = ''.join(reversed(input_str))
print(reversed_str)

Output:

tromodloV