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    In Python, a variable is a symbolic name that refers to an object or value stored in memory. You don’t declare its type explicitly — Python determines it dynamically based on the assigned value. This makes variables flexible but also requires careful handling to avoid type-related errors.

    A variable is created through assignment:

    # Creating variables
    word = "Python" # string
    number = 42 # integer
    pi = 3.1416 # float
    fruits = ["apple", "mango", "grape"] # list
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    Here, each name points to an object in memory. Variables hold references, not the actual data, so multiple variables can refer to the same object.

    Dynamic Typing means you can reassign a variable to a different type:

    age = 25 # int
    age = "twenty" # now a string
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    Multiple Assignments are supported:

    # Same value to multiple variables
    x = y = z = 0

    # Different values in one line
    a, b, c = 1, 2.5, "Python"
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    Type Checking & Casting:

    n = 42
    print(type(n)) # <class 'int'>

    # Casting
    s = "10"
    n = int(s) # string to int
    f = float(n) # int to float
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    Python - Variable Names - W3Schools.c…

    Variable Names A variable can have a short name (like x and y) or a more descriptive name …

    W3School
    What is a variable naming convention in Python?
    Python ConstantsVariable Naming Conventions Constants are variables whose values are not meant to change during the execution of a program. In Python, constants are typically defined at the module level and written in UPPERCASE with underscores separating words.
    pythonguides.com
    Real Python
    https://realpython.com/python-variables
    Variables in Python: Usage and Best Practices – Real Python
  1. GeeksForGeeks
    https://www.geeksforgeeks.org › python › python-variables

    Python Variables - GeeksforGeeks

    Mar 25, 2026 · In Python, variables are used to store data that can be referenced and manipulated during program execution. A variable is essentially a name that is assigned to a value.

    • In Python, variables are used to store data that can be referenced and manipulated during program execution. A variable is essentially a name that is …

    See results only from geeksforgeeks.org
  2. W3School
    https://www.w3schools.com › python › python_variables_names.asp

    Python - Variable Names - W3Schools.com

    Variable Names A variable can have a short name (like x and y) or a more descriptive name (age, carname, total_volume). Rules for Python variables: A variable name must start with a letter or the …

    Code sample

    # Illegal variable names
    2myvar = "John"
    my-var = "John"
    my var = "John"
  3. Real Python
    https://realpython.com › python-variables

    Variables in Python: Usage and Best Practices – Real Python

    • See More

    In this tutorial, you'll learn how to use symbolic names called variables to refer to Python objects, and gain an understanding of how to effectively use these fundamental building blocks in your code to …

  4. Python Guides
    https://pythonguides.com › python-naming-conventions...

    Python Naming Conventions For Variables

    Feb 21, 2025 · Learn Python naming conventions for variables, including practices for snake_case, constants, and private variables. This step-by-step guide includes …

  5. yasirbhutta.github.io
    https://yasirbhutta.github.io › python › docs › variables › variables-basics.html

    Python Variables Explained: Basics, Naming Rules & Practical Examples

    Learn Python variables with this beginner-friendly guide. Understand variable basics, naming rules (including valid vs invalid names), reserved keywords, and practice with hands-on coding tasks.

  6. FreeCodecamp
    https://www.freecodecamp.org › learn › ...

    How Do You Declare Variables and What Are Naming Conventions to …

    How Do You Declare Variables and What Are Naming Conventions to Name Variables? In Python, variables are like a labelled box for storing and referencing data of different types. To declare …

  7. micheledpierri.com
    https://www.micheledpierri.com › python › variables

    Variables, Naming Rules, and Basic Syntax - micheledpierri.com

    Learn Python variables, naming rules, and basic syntax. This lesson builds the foundation required for data analysis, statistics, and machine learning workflows in Python.

  8. Python Tutorial
    https://www.pythontutorial.net › python-basics › python-variables

    Python Variables - Python Tutorial

    Variable names can contain only letters, numbers, and underscores (_). They can start with a letter or an underscore (_), not with a number. Variable names cannot contain spaces. To separate words in …

  9. Replit
    https://replit.com › discover › how-to-name-variables-in-python

    How to name variables in Python - Replit

    Learn how to name variables in Python effectively. This guide covers conventions, tips, real-world examples, and common error debugging.

  10. Pythondex
    https://pythondex.com › learn › python › variables-naming

    Variable Naming Rules in Python - Pythondex

    Start with a letter (a–z, A–Z) or an underscore (_). Use only letters, numbers, and underscores. No spaces or special characters. Python is case-sensitive: age and Age are different variables. Choose …

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