You will need to employ some form of loop, but why shouldn't you? It can be as easy as:
$ages{$_->{'age'}}++ foreach values %hoh;
And you will find the number of children with the same age as the values keyed by the age in the hash
%ages:
{ 11 => 2, 12 => 2, 13 => 1 }
CountZero
A program should be light and agile, its subroutines connected like a string of pearls. The spirit and intent of the program should be retained throughout. There should be neither too little or too much, neither needless loops nor useless variables, neither lack of structure nor overwhelming rigidity." - The Tao of Programming, 4.1 - Geoffrey James
