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Question 4 of 52
What are Python keywords and identifiers?
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Keywords are reserved words with special meaning: if, else, for, while, def, class, import, etc.
Identifiers are names for variables, functions, classes, etc. Rules:
- Start with letter or underscore
- Contain letters, digits, underscores
- Case-sensitive
- Cannot be keywords
# Valid identifiers
variable_name = 10
_private_var = 20
ClassName = "example"
# Invalid identifiers
# 123variable = 10 # Cannot start with digit
# class = "test" # Cannot use keyword
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