I have a text file called "shoplist.txt" which one have:

drinks water cola fanta
fruit banana orange

And I want to get how many items per line I have. I'm able to extract drinks and fruit with function "cut" but how can I count how many words I have in each line?

My actually code is:

fileLine=`cat file.txt`
#Here I get each line saving it to fileLine
for line in $fileLine; do

But this code dosen't work because it save to %fileLine each work (drinks, then water,then cola,...)

How can I get the first line and then count the words on that line?

  • wc would do the necessary job in a loop. Mar 5 '19 at 5:31
  • Is the output of the awk script in the answer what you want to have? If not, what exactly do you want to get?
    – Bodo
    Mar 5 '19 at 11:09

If you can use awk, NF is the number of fields in the current line (by default, a field is a word delimited by any amount of whitespace).


awk '{ print NF, $0 }' inputfile

With your sample input, this will print

4 drinks water cola fanta
3 fruit banana orange
  • The more cryptic awk '$0=NF" "$0' inputfile is a shorter solution.
    – IsaaC
    Mar 5 '19 at 4:14
  • @Isaac: Really ? Is shorter better ? In this specific case Bodo's answer is just the answer to OP, ... and [s]he beat us all to it. :-[
    – Cbhihe
    Mar 5 '19 at 11:05
  • Thanks everyone for their advices. I didn't know about awk, thanks!
    – Multi
    Mar 5 '19 at 17:25

In Bash and wc:

while read line; do
    wc -w <<< "$line"
done < file.txt

wc counts lines, words, bytes in files. With a shell loop you can make it count words in a line.

  • Thanks, I was aware about WC -l for lines but not for words, thanks!
    – Multi
    Mar 5 '19 at 17:25
  • Upvote. Such a simple job no need to bother awk
    – Bruce
    Nov 3 '19 at 21:52
  • Sure, @bruce. For 10,000 line file, why run awk when you can run 10,000 consecutive wc processes? Nov 28 '19 at 19:02
  • Yes, you are right @Paul_Pedant. If performance becomes an issue, we definitely will go a programming language, such as awk, perl or python, or C who knows. But before that, I'd like to keep it simple enough.
    – Bruce
    Dec 1 '19 at 0:30
  • @bruce: But Bodo published a one-liner that does what the 4-line shell does, but probably 200 times faster, and it got 14 upvotes. It's hardly a "programming language" issue: it contains one simple command. How would you explain the simplicity of <<< in the Bash version, for example? Dec 1 '19 at 19:38

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