A-Z about Python Variables

Board Infinity -

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.