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bashintegersumcut

Bash: Sum of integer values from stdout

Is there a way to do this?

I have a set of data which includes an integer field:

cat myinput
14 bytes long.
36 bytes long.
32 bytes long.

I would like to add the integer values in these text lines to give a sum total. So in the case of the above example, the sum total of the integer values is 82. I had thought of using something like:

cat myinput | cut -f1 -d' ' | <...add code here to add the filtered integers...>

It seems I have to expr in some way, but I can't figure out how.

Can anyone help?

Solution

  • Let's do it with awk?

    $ awk 'a+=$1; END{print a}' file
14 bytes long.
36 bytes long.
32 bytes long.
82

    With bash:

    f=0
while read i
do
  n=$(echo $i | cut -d' ' -f1)
  tot=$(($n + $tot))
done < file

$ echo $tot
82