printing output of lists:keysearch erlang

Question

Hi, I am not able to print the return output of the following lists:keysearch function.

case lists:keysearch(Query,1,Data) of
    {value,Answer} ->
    io:format("~p",Answer);
    false ->
    io:format("not found ~n")
end,

I know Answer is my tuple that i should print out.Can anyone tell me what mistake i am doing ? thanks in advance

Answer 1

io:format needs a list of arguments, even if there is only one:

io:format("~p", [Answer]);

Answer 2

You probably want to print the key that you found and thus do

{value, {Query, Answer}} -> io:format("~p", [Answer]);