Section 1.1: Creating Variables

Variables in Python are established by assigning a value to them. There is no need to explicitly declare the type of a variable; Python automatically determines its type based on the assigned value. Variable names can include letters, numbers, and underscores but cannot begin with a digit. It's important to note that Python is case-sensitive, meaning that myVariable, MyVariable, and myvariable would be recognized as distinct entities. For clarity, variable names should be descriptive.

Example:

# Assigning values to variables

my_variable = 10

my_string = "Hello, world!"

pi_value = 3.14

Section 1.2: Data Types in Python

Python accommodates a range of data types, which include:

• Integers: Whole numbers without decimal points (e.g., 5, -10, 1000).
• Floats: Numbers that contain decimal points (e.g., 3.14, 2.5, -0.5).
• Strings: Text data enclosed in single or double quotes (e.g., "Hello", 'Python', "123").
• Boolean: Represents truth values, either True or False.
• Lists: Ordered collections of items that are mutable (modifiable) (e.g., [1, 2, 3], ["apple", "banana", "orange"]).
• Tuples: Ordered collections of items that are immutable (cannot be altered after creation) (e.g., (1, 2, 3), ("apple", "banana", "orange")).
• Dictionaries: Collections of key-value pairs that are mutable (e.g., {"name": "John", "age": 30}).

Example:

# Examples of different data types

my_integer = 5

my_float = 3.14

my_string = "Hello, world!"

is_python_fun = True

my_list = [1, 2, 3]

my_tuple = (4, 5, 6)

my_dictionary = {"name": "John", "age": 30}