1234567890123456 2004-07-10 14:47:39 51.12345 -1.12345 #### #!/usr/bin/perl open (INPUT, "< data") or die "Couldn't open data file for reading: $!\n"; while () { $firstvalue =~ /(\d\d\d\d\d\d\d\d\d\d\d\d\d\d\d\d)/; # match first 16 digit value print $firstvalue #"This is the first parameter.\n"; } close (INPUT);