Input/Output :: Handling STDIN and STDOUT

• Standard in, or STDIN, is the default file handle for reading in text or data streams.
• Input can be handled like this:

    $input = 
   @linput = 
  

  where $input would store the input line. You can even store STDIN into a list as @linput line shows. You can continuously read in STDIN by:

    while (<>) {
     print $_;
   }
  

  The above example shows the diamond operator in action. The diamond operator is the shorthand for , and we are printing from the scratch list @_.
• All prints are directed by default to Standard Out.
• Perl also provides a STDERR stream.
• You can use the C functions, sprintf and printf in Perl to format your text! Very powerful!