Using PERL verify whether file exists

How to tell if a file exists in Perl:

If you want to check the file is exist or not means simply add the '-e' behind the file name.

For example: 

 $filename = '/path/to/your/file.doc';
 if (-e $filename) 

 {
 print "File Exists!";
 } 

 You want to check it file not exist means use 'unless' or '!' operator.

For Example: 

 unless (-e $filename) 

 {
 print "File Doesn't Exist!";
 }