Given an expression that specifies an element or slice of a hash, delete deletes the specified elements from that hash so that exists on that element no longer returns true. Setting a hash element to the undefined value does not remove its key, but deleting it does; see exists.

In list context, usually returns the value or values deleted, or the last such element in scalar context. The return list's length corresponds to that of the argument list: deleting non-existent elements returns the undefined value in their corresponding positions. Since Perl 5.28, a