Day 4: Working with Strings in Python

Task

Explore string manipulation and built-in string methods.

Description

Strings are one of the most commonly used data types in Python. They allow you to store text data and perform various operations such as slicing, concatenation, and applying built-in methods. Today, you’ll practice string operations and learn some of Python’s powerful string methods to manipulate text efficiently.

Key Concepts

  1. String Declaration: Declare strings using single or double quotes.
  2. String Concatenation: Combine strings using the + operator.
  3. String Slicing: Extract parts of a string using slicing notation.
  4. String Methods: Use built-in methods like lower(), upper(), split(), and replace() to modify strings.
  5. Escaping Characters: Handle special characters inside strings using backslashes (\).

Example

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# Declaring strings
greeting = "Hello"
name = "Alice"

# String Concatenation
full_greeting = greeting + ", " + name + "!"
print(full_greeting)  # Output: Hello, Alice!

# String Slicing
message = "Welcome to Python"
print(message[0:7])  # Output: Welcome

# Using String Methods
sentence = "python is awesome"
print(sentence.lower())  # Output: python is awesome
print(sentence.upper())  # Output: PYTHON IS AWESOME
print(sentence.split())   # Output: ['python', 'is', 'awesome']
print(sentence.replace("awesome", "great"))  # Output: python is great

# Escape Characters
quote = "He said, \"Python is amazing!\""
print(quote)  # Output: He said, "Python is amazing!"