6. Which of the following are valid Python variable names?

Question

BlackTom AI · Accepted Answer

Here we evaluate each candidate name against Python's rules for identifiers.

Option: my_var
This starts with a letter and uses only letters and underscores, which is perfectly acceptable for a Python variable name. It does not collide with a reserved keyword, so it’s valid.

Option: 2ndValue
This begins with a digit, which is not allowed for Python identifiers. Identifiers must start with a letter or an underscore, so this is invalid as a variable name.

Option: _name
Starting with an underscore is allowed in Python identifiers, and the rest of the characters are letters. This follows the rules and is therefore valid.

Option: class
Although it is a valid sequence of letters, class is a reserved keyword in Python (used to define a class). You cannot use keywords as variable names, so this is invalid.

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6. Which of the following are valid Python variable names?

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