Week 1: Python Fundamentals + Git

print("Hello, World!")   # displays text
print(42)                # displays an integer
print(3.14)              # displays a float

# This is a single-line comment
print("Python is fun")  # comment after code

"""
This is a multi-line comment (or docstring).
It can span multiple lines.
Use triple quotes to create it.
"""

name = "Alice"          # str (string)
age = 15                # int (integer)
height = 5.6            # float (decimal)
is_student = True       # bool (boolean)

# Check types with type()
print(type(name))       # 
print(type(age))        # 
print(type(height))     # 
print(type(is_student)) # 

# Student info
name = "Rahul"
age = 14
height = 5.2
is_student = True

# Print with type
print("Name:", name, "Type:", type(name))
print("Age:", age, "Type:", type(age))
print("Height:", height, "Type:", type(height))
print("Student:", is_student, "Type:", type(is_student))

# input() always returns a string
name = input("Enter your name: ")

# Convert to numbers for calculations
age = int(input("Enter your age: "))
height = float(input("Enter your height: "))

print(f"Hello {name}, age {age}, height {height}")

name = "Priya"
marks = 91.567
print(f"{name} scored {marks:.2f} marks.")  # formats to 2 decimal places
# Output: Priya scored 91.57 marks.

a = 10
b = 3
print(a + b)    # 13   (addition)
print(a - b)    # 7    (subtraction)
print(a * b)    # 30   (multiplication)
print(a / b)    # 3.333... (float division)
print(a // b)   # 3    (floor division)
print(a % b)    # 1    (remainder / modulus)
print(a ** b)   # 1000 (exponent: 10^3)

num1 = float(input("Enter first number: "))
num2 = float(input("Enter second number: "))

sum_result = num1 + num2
diff_result = num1 - num2
prod_result = num1 * num2
quot_result = num1 / num2

print(f"Sum: {num1} + {num2} = {sum_result}")
print(f"Difference: {num1} - {num2} = {diff_result}")
print(f"Product: {num1} * {num2} = {prod_result}")
print(f"Quotient: {num1} / {num2} = {quot_result:.2f}")

age = 18
if age >= 18:
    print("You can vote.")
else:
    print("Too young to vote.")

marks = 85
if marks >= 90:
    grade = "A"
elif marks >= 75:
    grade = "B"
elif marks >= 60:
    grade = "C"
else:
    grade = "D"
print(f"Grade: {grade}")

num = float(input("Enter a number: "))

if num > 0:
    print("The number is positive.")
elif num < 0:
    print("The number is negative.")
else:
    print("The number is zero.")

x = 10
print(x > 5 and x < 20)   # True  (both must be True)
print(x < 5 or x > 8)     # True  (at least one True)
print(not x == 10)        # False (reverses the result)

year = 2024
if year % 4 == 0:
    if year % 100 == 0:
        if year % 400 == 0:
            print("Leap year")
        else:
            print("Not a leap year")
    else:
        print("Leap year")
else:
    print("Not a leap year")

year = int(input("Enter year: "))
if (year % 4 == 0 and year % 100 != 0) or (year % 400 == 0):
    print(f"{year} is a leap year.")
else:
    print(f"{year} is not a leap year.")

print("--- Simple Calculator ---")
print("1. Add")
print("2. Subtract")
print("3. Multiply")
print("4. Divide")

choice = input("Choose (1-4): ")
num1 = float(input("Enter first number: "))
num2 = float(input("Enter second number: "))

if choice == '1':
    result = num1 + num2
    print(f"Result: {num1} + {num2} = {result}")
elif choice == '2':
    result = num1 - num2
    print(f"Result: {num1} - {num2} = {result}")
elif choice == '3':
    result = num1 * num2
    print(f"Result: {num1} * {num2} = {result}")
elif choice == '4':
    if num2 != 0:
        result = num1 / num2
        print(f"Result: {num1} / {num2} = {result}")
    else:
        print("Error: Cannot divide by zero.")
else:
    print("Invalid choice.")

mkdir python-week1
cd python-week1
# Create calculator.py using any text editor (copy code from Day 5)
git init
git add calculator.py
git commit -m "Added calculator project"
git log