String Reversal Approaches in DSA Python - Build from Scratch

String Reversal Approaches

📖 Scenario: Imagine you are helping a friend who wants to learn how to reverse words in a fun way. You will create a simple program that takes a word and shows it backwards.

🎯 Goal: Build a Python program that reverses a given string using different methods step-by-step.

📋 What You'll Learn

Create a string variable with a specific word

Create a helper variable for the reversed string

Use a for loop to reverse the string manually

Print the reversed string

💡 Why This Matters

🌍 Real World

Reversing strings is useful in puzzles, coding challenges, and understanding how text can be manipulated.

💼 Career

String manipulation is a basic skill needed in programming jobs, especially when working with text data or preparing data for analysis.

1

Create the original string

Create a string variable called word and set it to the exact value "hello".

DSA Python

# Create a string variable called word and set it to "hello"
# Your code here

Hint

Use quotes to create a string. For example: word = "hello"

2

Prepare a variable for the reversed string

Create an empty string variable called reversed_word to hold the reversed result.

DSA Python

word = "hello"
# Create an empty string variable called reversed_word
# Your code here

Hint

Set reversed_word to an empty string using double quotes.

3

Reverse the string using a for loop

Use a for loop with the variable char to go through each character in word. Inside the loop, add char to the front of reversed_word to build the reversed string.

DSA Python

word = "hello"
reversed_word = ""
# Use a for loop with char to reverse the string
# Your code here

Hint

Each time you see a character, add it before the current reversed string.

4

Print the reversed string

Print the value of reversed_word to show the reversed word.

DSA Python

word = "hello"
reversed_word = ""
for char in word:
    reversed_word = char + reversed_word
# Print the reversed_word
# Your code here

Hint

Use print(reversed_word) to display the reversed string.