how to zip file in linux

suppose there is folder name “backup” containing subfolders and files then,
> zip -r backup.zip backup

how to take input from keyboard and print to screen

#!/usr/bin/perl
$input = <STDIN>; // this will take input from keyboard
print $input ; // this will output to the screen

where is perl installed

by default its installed in linux
/usr/bin/perl
in scripts you have to write #!/usr/bin/perl to tell the script that it is perl interpreter.
sometimes the path is
/usr/local/bin/perl