5. Variable names

• In Python, variable names must start with a letter or underscore _

• Accents are allowed!

• Examples of valid names: price, action, salary, _x, year_2011, average_salary

>>> a = 2
>>> price = 500
>>> print(a)
2
>>> print(price)
500

• Examples of invalid names: average salary, 3x, 1st, @, $

>>> 3x = "text"
    File "<stdin>", line 1
    3x = "text"
     ^
SyntaxError: invalid syntax

Define valid and invalid variables below

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