Question

Which of the following identifier names are invalid and why?
1. Serial no.
2. Total Marks
3. 1st Room
4. total-Marks
5. Hundreds
6. Percentage
7. Total Marks
8. True
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Answer 1

Answer:

Serial_no.: Invalid - Identifier in python cannot contain any special character except underscore(_).

Total Marks: Invalid - Identifier in Python cannot contain any special character except underscore(_). If more than one word is used as a variable then it can be separated using underscore ( _ ), instead of space.

1st_Room: Invalid - Identifier in Python cannot start with a number.

total-Marks: Invalid - Identifier in Python cannot contain any special character except underscore(_). If more than one word is used as a variable then it can be separated using underscore ( _ ), instead of a hyphen ( - ).

Hundred$: Invalid - Identifier in Python cannot contain any special character except underscore(_).

_Percentage: Valid

True: Invalid - Identifier in Python should not be a reserved keyword.