Generated: Tue Feb 2 17:54:40 2010 from genprimes.pl 2007/03/31 1.2 KB.

#!/perl # NAME: genprimes.pl # AIM: To generate all the primes numbers up to a maximum number, # and insert them into an array, which expands itself ... # see : http://www.perlmeme.org/tutorials/arrays.html use strict; use warnings; my $num_primes = 0; my @primes; my $wrap = 10; my $cnt = 0; my $max_number = 50000; # Put 2 as the first prime so we won't have an empty array $primes[$num_primes] = 2; $num_primes++; print "Moment ... collecting the primes up to $max_number ...\n"; MAIN_LOOP: for my $number_to_check (3 .. $max_number) { for my $p (0 .. ($num_primes-1)) { if ($number_to_check % $primes[$p] == 0) { next MAIN_LOOP; } } # If we reached this point it means $number_to_check is not # divisable by any prime number that came before it. $primes[$num_primes] = $number_to_check; # store it $num_primes++; # and bump prime count } print "Output of $num_primes prime numbers ...\n"; for my $p (0 .. ($num_primes-1)) { print $primes[$p]; $cnt++; if ($cnt >= $wrap) { $cnt = 0; print "\n"; } else { print ", "; } } if( $cnt ) { print "\n"; } print "Done generation, and output of $num_primes prime numbers ...\n"; exit(0);