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$line="Bart  Lisa Maggie Marge Homer";
@simpsons=split(/\s/, $line); #splits $line and uses a piece of whites
+pace as a delimiter.
...

@simpsons=split(/\s+/ $line); #now splits $line on 1 or more whitespac
+e characters
#@simpsons now containts ("Bart","Lisa","Maggie","Marge","Homer");

open FILE, "data.txt";
while(<FILE>)
...
   print "Address: $address\n\n";
}
close FILE;

$string=join(" ",@simpsons);
  #string now equals "Bart Lisa Maggie Marge Homer";
...
$address="42 Tulip Lane, Holland MI, 49423";
$string=join("|",$name,$phone,$address);
#$string is now equal to "Bob|555-5555|42 Tulip Lane, Holland MI, 4942
+3"