use strict; use warnings; use autodie; #these 3 above are a must -have use Data::Dumper; my %ifac= ( 14.152 => "JCI", 9.334 => "JHEP", 5.745 => "JIMM", 6.270 => "JID", 1.480 => "JRN", 6.105 => "KI" ); print Dumper(\%ifac);