identify valid identifiers, justify why others are not identifiers.
a) Data_rec
b) 1 data
c) My.file
d) elif
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Data_rec is a valid identifier.
Rules:
Identifiers can be a combination of letters in lowercase (a to z) or uppercase (A to Z) or digits (0 to 9) or an underscore.
An identifier cannot start with a digit.
We cannot use special symbols like !, @, #, $, % etc. in our identifier.
Keywords cannot be used as identifiers.
Rules:
Identifiers can be a combination of letters in lowercase (a to z) or uppercase (A to Z) or digits (0 to 9) or an underscore.
An identifier cannot start with a digit.
We cannot use special symbols like !, @, #, $, % etc. in our identifier.
Keywords cannot be used as identifiers.
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