testing variables issue

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7.4.10 The exit Statement

The exit statement causes awk to immediately stop executing the current rule and to stop processing input; any remaining input is ignored. The exit statement is written as follows

The above is from :

Exit Statement - The GNU Awk User's Guide

So in the case where you are using *exit*, it will match the first line that matches NR==8 , print $2 and exit without processing any more lines

in the other case, it will continue looking to match NR==8. So in the case where you don't have exit, if awk find more than one line with NR==8, it will print $2 for them.
# 9  
thank you so much
i'm try to understand the usage of this method

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