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POShell command to sum integers, one per line?
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copied!<p>I am looking for a command that will accept as input multiple lines of text, each line containing a single integer, and output the sum of these integers.</p> <p>As a bit of background, I have a log file which includes timing measurements, so through grepping for the relevant lines, and a bit of <code>sed</code> reformatting I can list all of the timings in that file. I'd like to work out the total however, and my mind has gone blank as to any command I can pipe this intermediate output to in order to do the final sum. I've always used <code>expr</code> in the past, but unless it runs in <code>RPN mode</code> I don't think it's going to cope with this (and even then it would be tricky).</p> <p>What am I missing? Given that there are probably several ways to achieve this, I will be happy to read (and <code>upvote</code>) any approach that works, even if someone else has already posted a different solution that does the job.</p> <p>Related question: <a href="https://stackoverflow.com/questions/295781/shortest-command-to-calculate-the-sum-of-a-column-of-output-on-unix">Shortest command to calculate the sum of a column of output on Unix? </a> (credits <a href="https://stackoverflow.com/questions/450799/linux-command-to-sum-integers-one-per-line#451313">@Andrew</a>)</p> <hr> <p><strong>Update</strong>: Wow, as expected there are some nice answers here. Looks like I will definitely have to give <code>awk</code> deeper inspection as a <code>command-line tool</code> in general!</p>

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