Functions, Scope (Local/Global), Arguments, return, Lambda, filter()/map()/reduce(), Modules

📌 Key Concepts Overview 🧩 Part 1 — Why Functions? # WITHOUT a function — code duplicated everywhere a, b = 10, 20 print(a + b) str1 = input('Enter a string: ') if str1 == str1[::-1]: print('Palindrome...