I don't have only single print statment. i have big perl script in which i am using so many perl commands as well as no. of print statements. i want whole output to be printed on console as well as on text file.also i don't want to install any other module fom CPAN. is still any way to get out of this problm

Its called a subroutine, instead of

print  $fh $str;
...
print $fh $str;
...
print $fh $str;
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you write

DoublePrint( $fh, $fh2, $str );
...
DoublePrint( $fh, $fh2, $str );
...
DoublePrint( $fh, $fh2, $str );
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where DoublePrint prints to STDOUT and something else