Python Tutorials · Python Variables

Variable Names

Learn all about Variable Names in this comprehensive tutorial.

5 min read beginner

•A variable can have a short name (like x and y) or a more descriptive name (age, carname, total_volume).
•Variable names with more than one word can be difficult to read.
•Each word, except the first, starts with a capital letter:
•Each word starts with a capital letter:
•Each word is separated by an underscore character:

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 underscore character
A variable name cannot start with a number
A variable name can only contain alpha-numeric characters and underscores (A-z, 0-9, and _ )
Variable names are case-sensitive (age, Age and AGE are three different variables)
A variable name cannot be any of the Python keywords.

python

myvar = "Alice"my_var = "Alice"_my_var = "Alice"myVar = "Alice"
  MYVAR = "Alice"myvar2 = "Alice"

python

2myvar = "Alice"my-var = "Alice"
  my var = "Alice"

Note: Remember that variable names are case-sensitive

Multi Words Variable Names

Variable names with more than one word can be difficult to read.

There are several techniques you can use to make them more readable:

Each word, except the first, starts with a capital letter:

Each word starts with a capital letter:

Each word is separated by an underscore character:

2 questions

Which of the following is true about Variable Names?

It is strictly typedIt is evaluated at runtimeIt requires explicit memory managementIt is deprecated

What is the most common pitfall when working with Variable Names?

SyntaxErrorIndentationErrorNameErrorTypeError

Answer all questions to submit.