Hi all, I am trying to create a 7 digit random part number generator and have each number written to a .txt. This has been successful. However, I am now struggling to perform a test to check whether these random 7 digit numbers have been used before (by checking them against the used numbers in the text document). If it has i would like it to be discarded and then a new unique number genereated and checked. Can someone please help me with the code that would allow me to do this. Thanks 

use warnings;
use strict;
use diagnostics;

############### OPEN FILES ##################

my $database = "C:/Database.txt";
open (INPUT, ">>" , $database) || die "Can't open $database: $!";

############## PROCESS DATA #################


my $part_number_range = 10000000;
my $part_number = int(rand($part_number_range));
my $new_part_number = sprintf("%07d", $part_number);


print INPUT "$new_part_number\n";
}

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In reply to Check randomly generated numbers have not been used before by R3search3R

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