How do I count the number of records in awk?

How do I count the number of records in awk?


  1. ARGV, ARGC – Array of Command Line Arguments.
  2. FNR – Number of Records in File.
  3. FNR – The Current Record Number being processed.
  4. FS – Field Separator.
  5. FS – Field Separator.
  6. NF – Number of Fields.
  7. NF – Number of Fields.
  8. NR – Total Number of Records.

How do you get the total number of records in sofa in awk?

the total number of records currently is denoted by FNR. Show activity on this post. wc -l [file] displays number of newlines, not number of lines. It will report a number a bit smaller than actual number of lines.

How do you print on awk?

To print a blank line, use print “” , where “” is the empty string. To print a fixed piece of text, use a string constant, such as “Don’t Panic” , as one item. If you forget to use the double-quote characters, your text is taken as an awk expression, and you will probably get an error.

How do I print line numbers using SED?

2 Answers

  1. AWK: awk ‘NR==2,NR==4{print NR” “$0}’ file.txt.
  2. Double sed: sed ‘2,4! d;=’ file.txt | sed ‘N;s/\n/ /’
  3. glen jackmann’s sed and paste: sed ‘2,4! d;=’ file.txt | paste -d: – –
  4. bart’s Perl version: perl -ne ‘print “$. $_” if 2..4’ file.txt.
  5. cat and sed: cat -n file.txt | sed -n ‘2,4p’
  6. A bit of explanation:

What NR is awk?

NR is a AWK built-in variable and it denotes number of records being processed. Usage : NR can be used in action block represents number of line being processed and if it is used in END it can print number of lines totally processed.

What is NF in awk?

NF is a predefined variable whose value is the number of fields in the current record. awk automatically updates the value of NF each time it reads a record. No matter how many fields there are, the last field in a record can be represented by $NF .

What is awk ‘{ print $3 }’?

This. I. If you notice awk ‘print $1’ prints first word of each line. If you use $3, it will print 3rd word of each line.

What is print NF in awk?

The “NF” AWK variable is used to print the number of fields in all the lines of any provided file. This built-in variable iterates through all the lines of the file one by one and prints the number of fields separately for each line.