Variables
As a software engineer, you know that variables are the building blocks of any programming language. In Python, variables are even more straightforward to use due to its dynamic typing and easy-to-read syntax. This section aims to provide you with a comprehensive understanding of how to declare and work with different types of variables in Python.
What Are Variables?
Variables are named locations in memory that store data values. They act as placeholders, allowing you to perform operations, pass data around, and manage state in your applications. In Python, variables are created the moment you assign a value to them.
# Variable declaration and assignment
name = "John"
age = 30
is_married = FalseDynamic Typing
One of the unique features of Python is its dynamic typing system. Unlike statically-typed languages where you have to declare a variable's type explicitly, Python automatically determines the type based on the assigned value.
x = 10 # Integer
x = "Hello" # Now it's a StringVariable Naming Conventions
Python has some rules and conventions for naming variables:
- Variable names must start with a letter or an underscore.
- They can contain letters, numbers, and underscores.
- Names are case-sensitive (
age,Age, andAGEare different variables).
# Valid variable names
first_name = "Alice"
lastName = "Smith"
_age = 25Types of Variables
Python supports various types of variables, including:
- Integers: Whole numbers (
x = 5) - Floats: Decimal numbers (
y = 3.14) - Strings: Text (
name = "Python") - Booleans: True or False (
is_valid = True)
# Different types of variables
integer_var = 42
float_var = 3.14
string_var = "Python"
boolean_var = TrueBook a conversation with us for personalize training today!