tldr/pages/common/awk.md

# awk

> A versatile programming language for working on files.
> More information: <https://github.com/onetrueawk/awk>.

- Print the fifth column (a.k.a. field) in a space-separated file:

`awk '{print $5}' {{filename}}`

- Print the second column of the lines containing "something" in a space-separated file:

`awk '/{{something}}/ {print $2}' {{filename}}`

- Print the last column of each line in a file, using a comma (instead of space) as a field separator:

`awk -F ',' '{print $NF}' {{filename}}`

- Sum the values in the first column of a file and print the total:

`awk '{s+=$1} END {print s}' {{filename}}`

- Print every third line starting from the first line:

`awk 'NR%3==1' {{filename}}`

- Print different values based on conditions:

`awk '{if ($1 == "foo") print "Exact match foo"; else if ($1 ~ "bar") print "Partial match bar"; else print "Baz"}' {{filename}}`

- Print all lines where the 10th column value equals the specified value :

`awk '($10 == value)'`

- Print all the lines which the 10th column value is between a min and a max :

`awk '($10 >= min_value && $10 <= max_value)'`
Adding a file for awk. 2014-03-08 17:03:01 +00:00			`# awk`

Formatted all pages according to guidelines. 2016-01-07 17:31:27 +00:00			`> A versatile programming language for working on files.`
awk: add link to homepage 2019-06-09 00:05:27 +01:00			`> More information: <https://github.com/onetrueawk/awk>.`
Adding a file for awk. 2014-03-08 17:03:01 +00:00
awk: introduce $NF (#956) Numbered field references have been used in the first two examples, so it's quite reasonable to take the opportunity to introduce a new (and quite useful!) concept. In addition, this commit makes a few tweaks to the example descriptions, to make them clearer. 2016-07-16 13:30:28 +01:00			`- Print the fifth column (a.k.a. field) in a space-separated file:`
Adding a file for awk. 2014-03-08 17:03:01 +00:00
			`awk '{print $5}' {{filename}}`

awk: introduce $NF (#956) Numbered field references have been used in the first two examples, so it's quite reasonable to take the opportunity to introduce a new (and quite useful!) concept. In addition, this commit makes a few tweaks to the example descriptions, to make them clearer. 2016-07-16 13:30:28 +01:00			`- Print the second column of the lines containing "something" in a space-separated file:`
awk: add /search/ example 2016-02-04 18:30:40 +00:00
			`awk '/{{something}}/ {print $2}' {{filename}}`

awk: introduce $NF (#956) Numbered field references have been used in the first two examples, so it's quite reasonable to take the opportunity to introduce a new (and quite useful!) concept. In addition, this commit makes a few tweaks to the example descriptions, to make them clearer. 2016-07-16 13:30:28 +01:00			`- Print the last column of each line in a file, using a comma (instead of space) as a field separator:`
Adding a file for awk. 2014-03-08 17:03:01 +00:00
awk: introduce $NF (#956) Numbered field references have been used in the first two examples, so it's quite reasonable to take the opportunity to introduce a new (and quite useful!) concept. In addition, this commit makes a few tweaks to the example descriptions, to make them clearer. 2016-07-16 13:30:28 +01:00			`awk -F ',' '{print $NF}' {{filename}}`
Adding a file for awk. 2014-03-08 17:03:01 +00:00
awk: introduce $NF (#956) Numbered field references have been used in the first two examples, so it's quite reasonable to take the opportunity to introduce a new (and quite useful!) concept. In addition, this commit makes a few tweaks to the example descriptions, to make them clearer. 2016-07-16 13:30:28 +01:00			`- Sum the values in the first column of a file and print the total:`
Adding a file for awk. 2014-03-08 17:03:01 +00:00
			`awk '{s+=$1} END {print s}' {{filename}}`

awk: add print every nth line example (#2008) 2018-02-23 06:05:11 +00:00			`- Print every third line starting from the first line:`

			`awk 'NR%3==1' {{filename}}`
awk: add loops and conditions examples (#3300) 2019-10-03 08:32:03 +01:00
			`- Print different values based on conditions:`

awk: simplify loop/fix missing filename (#3848) 2020-02-17 21:26:27 +00:00			`awk '{if ($1 == "foo") print "Exact match foo"; else if ($1 ~ "bar") print "Partial match bar"; else print "Baz"}' {{filename}}`
awk: add operators match (#4606) 2020-11-01 14:42:00 +00:00
			`- Print all lines where the 10th column value equals the specified value :`

			`awk '($10 == value)'`

			`- Print all the lines which the 10th column value is between a min and a max :`

			`awk '($10 >= min_value && $10 <= max_value)'`