Question

Write the type of tokens from the following:
(i) if (ii) roll_no

Answer 1

Answer:

(i) if is a keyword

(ii)roll-no is a identifier

keywords: These are predefined words with special meaning to the language compiler..Eg : if,and

Identifier:Names given to different parts of the program

Answer 2

1. Tokens are the smallest individual elements in a program that are relevant to a compiler's operation.
2. A token is the smallest unit of measurement in a C program.
3. Every single punctuation mark and word in a C program is a token.

(i) Keywords are syntax elements that cannot be used as identifiers.

For example, 'if' is a programming structure used for decision control.

Hence, 'if' is a keyword.

(ii) An identifier is a string of alphanumeric characters that begins with a letter of the alphabet or an underline and ends with another letter of the alphabet, a numeric digit, or an underscore.

'roll_no' is a string that consists of alphabets and underscore.

Hence, 'roll_no' is an identifier.

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