Python Programming

What will be the output of the following code? x = "10" y = 5 print(x * y)

Which of the following is a valid variable name in Python?

What does the following code print? name = "Alice" print(type(name))

What is the type of the variable below? flag = True

*Guys, Big Announcement!* *We’ve officially hit 2 MILLION followers — and it’s time to take our Python journey to the next level!* I’m super excited to launch the 30-Day Python Coding Challenge — perfect for absolute beginners, interview prep, or anyone wanting to build real projects from scratch. This challenge is your daily dose of Python — bite-sized lessons with hands-on projects so you actually code every day and level up fast. *Here’s what you’ll learn over the next 30 days:* *Week 1: Python Fundamentals* - Variables & Data Types (Build your own bio/profile script) - Operators (Mini calculator to sharpen math skills) - Strings & String Methods (Word counter & palindrome checker) - Lists & Tuples (Manage a grocery list like a pro) - Dictionaries & Sets (Create your own contact book) - Conditionals (Make a guess-the-number game) - Loops (Multiplication tables & pattern printing) *Week 2: Functions & Logic — Make Your Code Smarter* - Functions (Prime number checker) - Function Arguments (Tip calculator with custom tips) - Recursion Basics (Factorials & Fibonacci series) - Lambda, map & filter (Process lists efficiently) - List Comprehensions (Filter odd/even numbers easily) - Error Handling (Build a safe input reader) - Review + Mini Project (Command-line to-do list) *Week 3: Files, Modules & OOP* - Reading & Writing Files (Save and load notes) - Custom Modules (Create your own utility math module) - Classes & Objects (Student grade tracker) - Inheritance & OOP (RPG character system) - Dunder Methods (Build a custom string class) - OOP Mini Project (Simple bank account system) - Review & Practice (Quiz app using OOP concepts) *Week 4: Real-World Python & APIs — Build Cool Apps* - JSON & APIs (Fetch weather data) - Web Scraping (Extract titles from HTML) - Regular Expressions (Find emails & phone numbers) - Tkinter GUI (Create a simple counter app) - CLI Tools (Command-line calculator with argparse) - Automation (File organizer script) - Final Project (Choose, build, and polish your app!) *React with ❤️ if you're ready for this new journey* Python Learning Series: https://whatsapp.com/channel/0029VaiM08SDuMRaGKd9Wv0L/1527

Which data type is used to store decimal numbers in Python?

Now, let’s move on to next topic in the Python coding challenge. *Operators in Python* Operators are special symbols or keywords that perform operations on variables and values. *Types of Operators in Python:* *1. Arithmetic Operators* Used for basic math: + (add), - (subtract), * (multiply), / (divide), // (floor divide), % (modulus), ** (power) a = 10 b = 3 print(a + b) # 13 print(a ** b) # 1000 *2. Comparison Operators* Used to compare two values: ==, !=, >, <, >=, <= x = 5 print(x == 5) # True print(x != 3) # True *3. Logical Operators* Used to combine conditional statements: and, or, not age = 20 print(age > 18 and age < 25) # True *4. Assignment Operators* Used to assign values to variables: =, +=, -=, *=, /=, etc. score = 10 score += 5 # score is now 15 *Mini Project: Build a Simple Calculator* Let’s apply what we’ve learned! *Task: Build a calculator that asks the user to enter two numbers and an operator, then prints the result.* *Approach* 1. Take two numbers from the user. 2. Ask for an operator (+, -, *, /). 3. Perform the operation based on what the user entered. 4. Print the result, or shows "Invalid operator!" if the input is wrong. *Python Code*: num1 = float(input("Enter first number: ")) op = input("Enter operator (+, -, *, /): ") num2 = float(input("Enter second number: ")) if op == "+": print(num1 + num2) elif op == "-": print(num1 - num2) elif op == "*": print(num1 * num2) elif op == "/": print(num1 / num2) else: print("Invalid operator!") *React with ❤️ once you’re ready for the quiz* Python Coding Challenge: https://whatsapp.com/channel/0029VaiM08SDuMRaGKd9Wv0L/1661

Here are the correct answers for the above quizzes: *Q1. Which of the following is a valid variable name in Python?* ✅ *Answer: c) user_2* - 2user is invalid (can’t start with a digit) - user-name is invalid (hyphens aren’t allowed) - user_2 is valid (letters, digits, underscores allowed but cannot start with a digit) *Q2. What will be the output of the following code?* x = "10" y = 5 print(x * y) *✅ Answer: b) 1010101010* "10" * 5 repeats the string "10" five times. No error, because it's a string multiplied by an integer. *Q3. What is the type of the variable below?* flag = True ✅ *Answer: c) bool* True is a Boolean value in Python. *Q4. Which data type is used to store decimal numbers in Python?* ✅ *Answer: b) float* float is used for numbers with decimal points like 3.14, 7.0, etc. *Q5. What does the following code print?* name = "Alice" print(type(name)) ✅ *Answer: b) <class 'str'>* The type() function returns the data type of a variable, and for strings, it's <class 'str'>. *React with ❤️ if you're ready for the next topic* Python Coding Challenge: https://whatsapp.com/channel/0029VaiM08SDuMRaGKd9Wv0L/1661

Today, let's start with the first topic of Python Coding Challenge: *Variables & Data Types* *What is a variable?* Think of a variable as a label on a container that holds some data. You create a variable by giving it a name and putting a value inside. In Python, it looks like this: name = "Alex" age = 25 height = 5.9 is_student = True - name holds text (called a string) — notice the quotes! - age holds a whole number (integer) - height holds a decimal number (float) - is_student holds a True/False value (boolean) You can check a variable’s type using type(): print(type(name)) # <class 'str'> print(type(age)) # <class 'int'> *Why use variables?* They let you store information so your program can remember it and use it later — like a player's score or your name. *Valid Variable Names* Python has some rules for naming variables: ✅ Must start with a letter or underscore ✅ Can contain letters, numbers, and underscores ❌ Cannot start with a number ❌ Cannot use Python’s built-in keywords like if, while, class, etc. *Examples:* user_name = "Amit" # valid _user2 = "Riya" # valid 2nd_user = "Error!" # ❌ Invalid: starts with number *Let’s build a small project!* We’ll write a simple program that asks for your name, age, and favorite hobby, then prints a fun personalized message. *Here’s the full code:* # Ask the user for their name and save it in a variable name = input("What's your name? ") # Ask for their age and save it age = input("How old are you? ") # Ask for their favorite hobby and save it hobby = input("What's your favorite hobby? ") # Print a personalized message using the info collected print(f"Hey {name}! So you’re {age} years old and love {hobby}. That’s awesome!") *How this works:* input() waits for you to type something and press Enter — whatever you type gets saved in the variable. print() shows a message on the screen. The f"" means you can include variables inside the message for personalization. *React with ❤️ once you’re ready for the quiz* Python Coding Challenge: https://whatsapp.com/channel/0029VaiM08SDuMRaGKd9Wv0L/1661

*Python Cheatsheet* 🐍 This Cheatsheet covers the core Python concepts everyone should know. *1. Basics* print() – Outputs text to the screen. Comments – Use # for single-line and triple quotes """ for multi-line comments. print("Hello") # This will print Hello *2. Variables & Data Types* Variables store values of different types like numbers, strings, booleans, lists, etc. x = 10 # Integer name = "Alice" # String flag = True # Boolean *3. Conditionals* Used to make decisions in code using if, elif, and else. if x > 0: print("Positive") else: print("Not positive") *4. Loops* - For loop: Iterates over a sequence. - While loop: Repeats as long as a condition is true. for i in range(3): print(i) *5. Functions* A reusable block of code defined with def. def greet(name): return "Hello " + name *6. Lists & List Comprehension* - Lists: Store multiple items in one variable. - List comprehension: Short way to create lists. nums = [1, 2, 3] squares = [x**2 for x in nums] *7. Dictionaries* Key-value pairs, like a mini-database. user = {"name": "Bob", "age": 25} print(user["name"]) *8. String Methods* Strings are text, and Python provides handy methods to manipulate them. s = "hello" print(s.upper()) # "HELLO" print(s.replace("e", "a")) # "hallo" *9. File Handling* Read and write files using open(). with open("file.txt", "w") as f: f.write("Hi there!") *10. Error Handling* Prevents your program from crashing with try, except, and finally. try: x = 10 / 0 except: print("Error occurred") *11. Classes & Objects* Used in Object-Oriented Programming to create reusable code structures. class Dog: def __init__(self, name): self.name = name *12. Useful Built-in Functions* Handy tools built into Python. len(), type(), sum(), min(), max(), sorted() *React ❤️ for the detailed explanation of each Python concept*