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A variable can have a short name (like x and y) or a more descriptive name (age, carname, total_volume).
A variable name must start with a letter or the underscore character A variable name cannot start with a number
Formula
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.
myvar = "John" my_var = "John" _my_var = "John" myVar = "John" MYVAR = "John" myvar2 = "John"
2myvar = "John"
my-var = "John"
my var = "John"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: myVariableName = "John"
Each word starts with a capital letter: MyVariableName = "John"
Each word is separated by an underscore character: my_variable_name = "John"