What is the use of "stderr()"?

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How to determine strings length in perl?

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Explain tk?

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how to install a package in perl ????

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my @array=('data1','data2'); my @array1=('data1','data2'); my ($i,$k); $i=7; $k=7; while($i){ $array [++$#array] = 'ree'; $i--; print "@array"; } while($k){ push(@array1,'ree'); $k--; print "@array1"; } Are these two while loop are doing the same functionality ? What may be the difference?

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Consider the following example #! /bin/perl use strict; sub sample { my @arr=(1,2,3,4); return @arr; } my ($a,$b,$c,$d) = &sample; print "$a\n$b\n$c\n$d\n"; In the above code, How can I get the $c without using the arguments such as $a,$b. I don't want to use any array to get the return values.

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List the prefix dereferencer in Perl.

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What is the use of -t?

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how to find a substring in a string without using substr built in functions, and print the substring found

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What is the usage of -i and 0s options?

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What is the purpose of _package_ literal?

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Why to use perl?

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