$| = 1;
for my $i ( 1..10 ) {
    print $i, "\r";
    sleep 1;
}

[download]

$| = 1 does the magic. It turns on autoflush on the currently selected filehandle (stdout, by default).

The \r in print "...\r" sends the cursor back to the beginning of the line

$| is described in perlvar

In reply to Re: Outputing a simple counter to stdout on the same line. by FunkyMonk
in thread Outputing a simple counter to stdout on the same line. by batcater98

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