Bash Guide For Beginners

6.3.3. The number of records

The built-in NR holds the number of records that are processed. It is incremented after reading a new input line. You can use it at the end to count the total number of records, or in each output record:

kelly@octarine ~/test> cat processed.awk
BEGIN { OFS="-" ; ORS="\n--> done\n" }
{ print "Record number " NR ":\t" $1,$2 }
END { print "Number of records processed: " NR }

kelly@octarine ~/test> awk -f processed.awk test
Record number 1: record1-data1
--> done
Record number 2: record2-data2
--> done
Number of records processed: 2
--> done

kelly@octarine ~/test>

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