String Introduction

Strings are ordered, immutable sequences of characters used to store textual information.

Key Concepts & Detailed Explanation

In Python:

1. 1
   Strings can be defined using single ('...'), double ("..."), or triple ('''...''' or """...""") quotes.
2. 2
   Triple-quoted strings preserve literal newlines.
3. 3
   Strings are immutable: once created, individual characters cannot be changed in place.

Code Examples & Output

Expected Output:

Best Practices & Common Pitfalls

Use double quotes if your string contains an apostrophe: "Don't worry".

Practice Quiz

1. Can you modify a character in an existing string using 's[0] = "X"'?

• A) Yes
• B) No, strings are immutable
• C) Only in Python 2
• D) Only with mutable flag

2. Which function returns the total character count of a string?

• A) size()
• B) count()
• C) len()
• D) length()

Practice Challenge

Create a multiline string containing a welcome message for MSK Institute and print its total length.