Variables.py

# # LEVEL 1 — Basic Understanding
# # Objective: Test your knowledge of variable naming rules and basic assignment.

# # Q1. Which of the following variable names are INVALID in Python, and why?
# # a) user_age
# # b) 2nd_player
# # c) TotalScore
# # d) first-name
# # e) _hidden_data

# '''Ans: b and d option is INVAID '''


# # Q2. Python is case-sensitive. If you create a variable score = 50 and then try to print Score, what will happen?
# score=50
# # print(Score) #It will throw an error because of we have written capital S inside the print function while variable starts with the small letter. 


# # Q3. Look at this code: 100 = max_health. Is this valid Python code? If not, what is the rule that it breaks?
# # 100= max_health 
# # print(100) 
# #Yes, It will throw an error because you can't assign intergar literal as a variable.


# # Q4. What is "Dynamic Typing" in Python? (Hint: Can a variable hold an Integer, and then later hold a String?)
# #Ans: No primitive data types are immutable you can't modify it in the same memory location.



# # What is the value of y? Is y holding the letter 'x' or the integer 10?
# x=10
# y=x
# #Ans: x holding an integar 10 and y holding x which holds integar 10 so ultimately y also holds integar 10.


# # LEVEL 2 — Application
# # Objective: Create variables correctly and print them.

# # Q1. The Book Inventory
# # Create three properly named variables for a book: its title (string), its page count (integer), and its price (float). Print all three variables.
# title="400 Days"
# page_count=400
# price=256.55
# print(f"This book name is {title} and it has {page_count} pages and the price of this book is {price} INR")


# # Q2. The Shape Shifter
# # Create a variable named mystery_box. Assign the integer 5 to it and print it. On the next line, reassign the string "Surprise!" to the exact same variable, and print it again.
# mystery_box=5
# print(mystery_box)
# mystery_box="Surprise!"


# # Q3. The Constant Truth
# # Create a variable named is_python_fun and assign the correct Boolean literal to it. Print its type to prove it is a boolean.
# is_python_fun=True
# print(type(is_python_fun))

# # Q4. Fixing the Errors
# # The following code has illegal variable names. Fix the variable names so the code runs without errors.
# # my name = "Ayush"
# # @age = 22
# # class = "Python"
# my_name= "Ayush" # do not give spaces between words
# age=22  # special characters are not allowed in variables name.
# language="Python" # built-in keywords are not allowed in python like class.


# # Q5. Multiple Assignment
# # Python allows you to assign the same value to multiple variables in one line. Try assigning the literal 0 to three variables: player1_score, player2_score, and player3_score using a single line of code.
# player1_score=player2_score=player3_score=0
# print(player1_score,player2_score,player3_score)


# # LEVEL 3 — Problem Solving
# # Objective: Trace how data moves between variables in memory.

# # Q1. The Memory Trace
# # Read the code below. What will be printed at the end? (Do not run it in VS Code yet, trace it in your mind first!)
# a = 15
# b = a
# a = 30
# print(b) #Ans: 15


# Q2. The Swap (Without Math)
# You have two glasses.
# glass_a = "Milk"
# glass_b = "Water"
# empty_glass=glass_a #empty glass ke andr humne milk daal diyaa
# glass_a= glass_b #ab glass a me water bhara hua hai 
# glass_b= empty_glass #ab glass b me milk daal diyaa 
# print(f"The GLASS A has: {glass_a} and The GLASS B has {glass_b}")



# # Q3. Best Practices (PEP 8)
# # You want to create a variable for a bank account balance. Which of these three is the most "Pythonic" way to name it, and what is this naming style called?
# # a) BankAccountBalance = 1000
# # b) bankAccountBalance = 1000
# # c) bank_account_balance = 1000 #option c is best


# # Q4. The Missing Data
# # You are creating a variable for a user's profile picture, but the user hasn't uploaded one yet. What literal should you assign to the profile_picture variable to represent "nothing"?
# user_profile_picture=None

# # What does color1 print, and why?
# color1 = "Blue"
# color2 = "Red"
# color1 = color2
# color2 = "Green"
# print(color1) #it will print red colour


# # LEVEL 4 — Challenge
# # Objective: Think logically about state changes over time.

# # Q1. The Game State
# # Imagine you are building a text-based game.
# # Create a variable hero_health and set it to 100.
# # The hero takes damage. (Since we don't know math operators yet, simply reassign hero_health to 80).
# # The hero finds a health potion. Reassign it to 100.
# # The hero falls into a trap and loses all health. Reassign it to a literal that represents absolute zero or nothingness (not the number 0).
# # Print the hero_health variable after every single event.
# hero_health=100
# print(hero_health)
# hero_health=80
# print(hero_health)
# hero_health=100
# print(hero_health)
# hero_health=None
# print(hero_health)


# # Q2. The Vault Password
# vault_code = 1234
# fake_code = vault_code
# vault_code = 9999
# # If a hacker steals the fake_code variable, what number do they get? Explain why changing vault_code to 9999 did not update fake_code.
# #Ans: 1234 i think code runs from top to bottom but i dont know exact the code flow abhi ye sab nhi padhaya hai


# # LEVEL 5 — Mini Project
# # Project Name: The Digital Student ID Card
# # Requirements:
# # Write a Python script that creates a digital ID card for a student (you can use your own details!).
# # You must define the following variables, making sure your variable names follow perfect Python naming conventions (snake_case):
# # First Name
# # Last Name
# # Age
# # Course Name (e.g., Data Science or NPTEL Python)
# # Current GPA / Percentage (Float)
# # Is Enrolled (Boolean)
# # After defining all the variables, use print() to display each variable one by one so it looks like an ID card is being printed out.

# first_name="AYUSH"
# last_name="KUMAR"
# age=21
# course_name="BS computer Sciencec and Data Analytics"
# current_cgpa=None
# is_enrolled=True
# print(f"Name: {first_name} {last_name}")
# print(F"Age: {age}")
# print(f"Course: {course_name}")
# print(f"Current Cgpa: {current_cgpa}")
# print(f"ID Active Status: {is_enrolled}")