🧠 Python Notes – Chapter 2: Variables, Data Types, Operators, and Input

📌 1) variables.py – Simple Variables & Arithmetic

📜 Code:

a = 12  # Integer value assigned to variable 'a'
b = 829  # Integer value assigned to variable 'b'

print(b / a)  # Division operator returns float (even if both operands are integers)

📝 Explanation:

• Variables in Python can store values like numbers, text, etc.
• Python is dynamically typed, meaning you don't need to declare the data type.
• / performs float division (e.g., 10/3 = 3.333...)
• For integer division, use // (e.g., 10//3 = 3)

📌 2) database.py – Common Data Types

📜 Code:

a = 8723  # Integer
b = 78076.3496346  # Float (decimal number)
c = True  # Boolean: Can only be True or False
d = "Prathamesh"  # String (text)
e = None  # Special null value in Python

print(d is e)  # Checks whether both variables refer to the same object (identity)

📝 Explanation:

• ✅ int – Whole numbers
• ✅ float – Decimal numbers
• ✅ bool – True or False
• ✅ str – Text
• ✅ NoneType – Represents no value / empty