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Python Basics To Advanced Level / of Python Code Introduction

🐍 Python Code Introduction

📌 What is Python Code?

Python code is a set of instructions written in the Python programming language that tells the computer what to do. It is known for its clean, readable, and beginner-friendly syntax.

✨ Key Features of Python Code

Feature Description
Simple Syntax Easy to write and understand. Looks like plain English.
Indentation-based Uses indentation (spaces) to define blocks instead of curly braces {}.
Dynamically Typed No need to declare data types. Python detects it automatically.
Interpreted Language Code runs line by line, making it easy to debug and test.
Extensive Libraries Thousands of built-in and third-party modules for data, web, AI, and more.

🧪 Basic Python Code Example

# This is a comment
print("Hello, World!")  # Output: Hello, World!

Explanation:

  • # is used for comments.
  • print() is a built-in function to show output on the screen.
  • Text inside quotes is called a string.

🔁 Simple Program

name = input("Enter your name: ")
print("Welcome,", name)

Sample Output:

Enter your name: Sairam
Welcome, Sairam

🧱 Python Code Structure

Part Example Purpose
Variable x = 10 Stores data
Function def greet(): Groups reusable code
Conditionals if x > 5: Makes decisions
Loops for i in range(5): Repeats code
Comments # This is a comment Describes the code (not executed)

🎯 Why Learn Python Code?

  • Easy to start for beginners.
  • Highly demanded in Data Engineering, Web Development, Automation, and AI.
  • Helps build real-world applications like:
    • ETL Pipelines
    • REST APIs
    • Dashboards
    • Machine Learning models