Is this type of output what you are talking about? 
#!/usr/bin/env perl
use strict;
use warnings;

$| = 1;
my $i=0;

while ( $i < 10 ) {
    print "$i\r";
    $i++;
    sleep 1;
}

while ( $i >= 0 ) {
    print " " x 80 . "\r";
    print "$i\r";
    $i--;
    sleep 1;
}

print "\n";

[download]

This script counts up from 0 to 10 (and back to 0) with each number replacing the previous. It does this by using the carriage return character (\r) instead of the new line character (\n), which is essentially a carriage return followed by a line-feed. The $| = 1 makes the output autoflush. One thing to keep in mind is that printing a string that is shorter than the previous will result in artifacts of the previous longer string. You can get around this by printing several spaces with something like: print " " x 80 . "\r";

note: If you want to keep the final output, be sure to print a \n when you are all done or it will get over-written by the next (unrelated) output.

In reply to Re: Controlling already printed text to console. by frozenwithjoy
in thread Controlling already printed text to console. by humble

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