Looping over keys of a hash

The same way we can loop over keys of a hash - after fetching them using the "keys" function. The declaration of hashes in Perl 6 is similar to that in Perl 5 but when access individual elements in the hash it now keeps the % prefix. Thus the value of the key "Foo" will be %phone{"Foo"}. Similarly if $name contains "Foo" we can use the %phone{$name} expression to get back the relevant value. As mentioned earlier the string interpolation of hashes requires curly braces around the statement.

#!/usr/bin/perl6
use v6;

my %phone = 
	"Foo" => 123,
	"Bar" => 456,
;

for keys %phone -> $name {
	say "$name %phone{$name}";
}