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Re: Add numbers row by row

by toolic (Bishop)
on Oct 25, 2013 at 14:05 UTC ( #1059674=note: print w/replies, xml ) Need Help??

in reply to Add numbers row by row

use warnings; use strict; my $tot = 0; while (<DATA>) { my ($num, $date) = split; $tot += $num; printf "%-5d %s\n", $tot, $date; } __DATA__ 1 2005-01-16 6 2005-01-28 1 2005-01-31 2 2005-02-01 2 2005-02-02 1 2005-02-05

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Re^2: Add numbers row by row
by epimenidecretese (Acolyte) on Oct 25, 2013 at 14:20 UTC
    Thank you very much! Works great. Where could I learn something about this string?
    printf "%-5d %s\n", $tot, $date;
    I don't really understand what's going on.

    One of Crete's own prophets has said it: 'Cretans are always liars, evil brutes, lazy gluttons'.
    He has surely told the truth.

      You're welcome.
      Where could I learn something about this string?

      In a variety of places:

      • The "Function Nodelet", which is on the right side near the bottom of the page of my browser here at the Monastery, has a link to the printf docs. I'm not sure if this nodelet is enabled by default.
      • The official documentation is online: printf
      • And it is also at your command prompt: perldoc -f printf
      > Where could I learn something about this string?

      You either type "perldoc -f printf" or sprintf into your console ...

      ... or you check the online docs at (but beware of the Perl version)

      It's also searchable per "duckduckgo: perl printf" or "google: perl printf" or other search machines...

      Cheers Rolf

      ( addicted to the Perl Programming Language)

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