Because you always effectively assign next => $curr , hence it's always defined.

Try Data::Dumper to check if your data is what you think it should be.

Cheers Rolf
(addicted to the Perl Programming Language and ☆☆☆☆ :)
Je suis Charlie!

In reply to Re^3: Reversing a singly linked list by LanX
in thread Reversing a singly linked list by punitpawar

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