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Which built-in variable is used by the awk to specify the line numbers?

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Which built-in variable is used by the awk to specify the line numbers?

(a) AR

(b) NR

(c) $$

(d) $?

This question was addressed to me during an interview.

The query is from Various Operations using Awk Command topic in division Awk – An Advanced Filter & Perl – The Master Manipulator of Unix

1 Answer

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Best answer
Correct answer is (b) NR

Best explanation: awk uses the built-in variable NR to specify line numbers. For example, to select lines 3 to 6 use the following command:

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