Perl keys Function
This function returns all the keys of the HASH as a list. The keys are returned in random order but, in fact, share the same order as that used by values and each.
Following is the simple syntax for this function −
This function returns number of keys in the hash in scalar context and list of keys in list context.
Following is the example code showing its basic usage −
#!/usr/bin/perl %hash = ('One' => 1, 'Two' => 2, 'Three' => 3, 'Four' => 4); @values = values( %hash ); print("Values are ", join("-", @values), "\n"); @keys = keys( %hash ); print("Keys are ", join("-", @keys), "\n");
When above code is executed, it produces the following result −
Values are 4-3-2-1 Keys are Four-Three-Two-One