Fundamentals of Python Programming

A-Z about Python Variables

Board Infinity
Board Infinity
A-Z about Python Variables

    A-Z about Python Variables

    Python data Types

    String Concatenation in Python

    String formatting in Python

    Python print() Function

    Everything you need to know about Strings in Python

    Not Equal Operator in Python

    How to sort string in Python?

    Python For Loop

    Python While Loop

    Everything You Need to Know About Tuples in Python | Data Science

    Learn Different Methods to convert a List into a Tuple in Python

    List Slicing in Python

    Converting String to Float in Python

    List Index Out of Range Error in Python

    Python Sort() Function

    Python 2D Array

    How to Remove Key from Python Dictionary?

    Python dictionary values()

    Converting String to Dictionary in Python

    Bytes to String in Python

    Python reduce() function

    What are defaultdict in Python?

    Generators in Python

    Learn about range() in Python

    Python numpy.linspace()

    Exit Command in Python

    Python Virtual Environment

Python Variables 101

The management of several values is required while creating a program. Variables are used to store values. A variable in Python is a label to which a value may be assigned. And a value is always connected to a variable. Consider this:

message = 'Hello from Board Infinity!'
print(message)
message = 'Good Bye. Check out our courses!'
print(message)
Output:
Hello from Board Infinity!
Check out our courses!

  • "message" is a variable in this instance. It contains a string that is printed to the console using the print() method.
  • The text "Good bye!" is assigned to the message variable which overwrites its previous value. Since we use the print() statement again, the new value is printed to the console.
  • The variable message might have a range of values at various points in time. Additionally, it's worth could shift throughout the duration of the program.

Creating variables

The following is the syntax for declaring a variable:

value= 625

The assignment operator is =.

You provide the variable name with a value using this syntax. The value you provide for the variable can be anything, including an integer, a string, etc. The following establishes a variable called "counter" and gives it the value 1:

my_counter = 1

Naming variables

There are some guidelines you must follow when naming a variable. You will encounter an error if you don't. The variable laws that you need to remember are as follows:

  • Only letters, digits, and underscores (_) are permitted in variable names. Instead of a number, they may begin with a letter or an underscore ( ).
  • Spaces are not permitted in variable names. You use underscores, like sorted list, to divide words in variables.
  • In Python, built-in functions, reserved words and keywords cannot share the same name as a variable.

You may define appropriate variable names using the following recommendations:

  • Variable names ought to be clear and illustrative. The active user variable, for instance, provides more information.
  • In the variable names, use underscores (_) to denote word breaks.
  • Because they resemble the numbers 1 and 0, the letter l and the capital letter O should not be used.

Summary

  • The name of a variable is a placeholder for a value.
  • The value of a variable could vary while the programme is running.
  • Use the syntax variable name = value to create a variable.
  • The variable names should ideally be short and descriptive.
  • They should also adhere to Python's rules for variable naming.