1. Functions: Define and Use Functions

Explanation: Defines a reusable function to greet a user and demonstrates its use.

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2. Lists: Basic Operations on Lists

Explanation: Shows how to add, remove, and manipulate elements in a list.

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3. Loops: Iterating Over Lists

Explanation: Iterates over a list and prints each item.

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4. File Handling: Read and Write Files

Explanation: Demonstrates writing to and reading from a text file using the 'with' statement.

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5. Data Manipulation with Dictionaries

Explanation: Adds and accesses elements in a dictionary, demonstrating data manipulation.

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