Notes for Different Programming Languages & Topics ⤵️

Here’s a collection of Detailed notes across various programming languages and tech topics. Feel free to explore:

📚| Python eBook + 99 Projects with Source code & Explanation (Full Version)

📒| Java Handwritten Notes
📒| SQL Handwritten Notes
📒| Linux Notes
📒| AI & ML Digital Notes
📒| R Language Notes
📒| MongoDB Handwritten Notes
📒| SQL Handwritten Notes
📒| C++ Programming Notes
📒| DSA Handwritten Notes
📒| Machine Learning Notes
📒| JavaScript Handwritten Notes
📒| Python Notes (Short Version)

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Python Beginner Roadmap 🐍

📂 Start Here
∟📂 Install Python & VS Code
∟📂 Learn How to Run Python Files

📂 Python Basics
∟📂 Variables & Data Types
∟📂 Input & Output
∟📂 Operators (Arithmetic, Comparison)
∟📂 if, else, elif
∟📂 for & while loops

📂 Data Structures
∟📂 Lists
∟📂 Tuples
∟📂 Sets
∟📂 Dictionaries

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∟📂 Defining & Calling Functions
∟📂 Arguments & Return Values

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HTTP Status Codes - Quick Cheat Sheet

✅ Success:

✅ 200 OK: Request completed successfully
🆕 201 Created: New resource has been created
📝 204 No Content: Successful, but nothing to return

🔁 Redirects:

🔀 301 Moved Permanently: Resource moved to a new URL
↪️ 302 Found: Temporary redirect
🧾 304 Not Modified: Use cached response

⚠️ Client Errors:

🙅 400 Bad Request: Invalid input
🪪 401 Unauthorized: Missing or invalid auth
🚫 403 Forbidden: Authenticated but not allowed
❓ 404 Not Found: Resource doesn’t exist
⏳ 408 Request Timeout: Client took too long
🧯 409 Conflict: Version/state conflict

🔥 Server Errors:

💥 500 Internal Server Error: Server crashed
🛠 502 Bad Gateway: Upstream server failed
🕸 503 Service Unavailable: Server overloaded / maintenance
⌛️ 504 Gateway Timeout: Upstream took too long

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NumPy Notes

R language complete notes ⚡️

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