Question

Which of the following is valid identifier names?

1 point

my_file

123X

Roll No

None

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Answer 1

Answer:

A valid identifier has characters [A-Z],[a-z] or numbers [0-9], $ (dollar sign) and _ (underscore). For example, @dataflair is not a valid identifier, because it contains @ which is a special character. We can't declare a variable with space. For example, data flair is invalid.

Explanation:

Answer 2

Explanation:

For example, Count, number, and Age are all valid identifiers. Similarly, x, y, z, A, or Care all valid names. ... Thus, float or double, and int are invalid identifiers, whereas Double, Int, and INT are valid identifiers because the case of letters has been altered.