Some extra notes about your code:

while (my ($keys, $values) = each %nums) {

is probably a little more readable than

while ((my $keys, my $values) = each (%nums)) {

and you could prefer also to use

open my $file, 'formal.xml'; instead: my $file;open $file, 'formal.xml');

and print "num: $number\n"; instead: print( "num: $number\n" );

In reply to Re^4: number of keys and values in a hash by pvaldes
in thread number of keys and values in a hash by veerubiji

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