🔍 Introduction

Strings are one of the most commonly used data types in Python. Whether you are processing user input, working with files, or parsing data, you’ll often find yourself working with strings. This tutorial will introduce you to strings and some of the most useful string methods that make your Python programs powerful and efficient.

🎯 Objective

By the end of this tutorial, you’ll be able to:

• Understand what Python strings are
• Use built-in string methods like .upper(), .lower(), .strip(), .replace(), and .split()
• Write a Python program that demonstrates these methods in action

💻 Python Code Example

# String Methods in Python

# Step 1: Define a string
text = "   Hello, Python World! Welcome to string manipulation.   "

# Step 2: Use string methods
print("Original text:", repr(text))

# Remove extra spaces
stripped_text = text.strip()
print("After strip():", repr(stripped_text))

# Convert to uppercase
upper_text = stripped_text.upper()
print("After upper():", upper_text)

# Convert to lowercase
lower_text = stripped_text.lower()
print("After lower():", lower_text)

# Replace words
replaced_text = stripped_text.replace("Python", "Awesome Python")
print("After replace():", replaced_text)

# Split into words
words = stripped_text.split()
print("After split():", words)
    

🧠 Program Explanation

Let’s walk through the structure of the program:

• Step 1: We define a string variable text with leading and trailing spaces.
• Step 2: We apply various string methods:
  • .strip() removes the extra spaces from both ends of the string.
  • .upper() converts all characters to uppercase.
  • .lower() converts all characters to lowercase.
  • .replace() replaces “Python” with “Awesome Python”.
  • .split() splits the string into a list of words.
• We use print() to display the results at each step for better understanding.

🚀 How to Run the Program

To run this Python program:

1. Open any Python environment or IDE (like IDLE, VS Code, or Jupyter Notebook)
2. Copy and paste the code into a new Python file (e.g., string_methods.py)
3. Run the script using python string_methods.py in your terminal or run button in the IDE
4. Observe the output printed to the console