#!/usr/local/bin/perl 

open (FILE1, ">file1"); 
$string = "this is a test"; 
select (FILE1); 
&writeline; 
select (STDOUT); 
&writeline; 
close (FILE1); 
 
sub writeline { 
    $~ = "WRITELINE"; 
    write; 
} 

format WRITELINE = 
I am writing @<<<<< to my output files. 
$string 