[erlang-questions] does erlang binary append need to convert to list first?

[wenew zhang]

on erl command shell,
A=list_to_binary("abc").
B=list_to_binary("def").
i want A+B convert to <<"abcdef">>
now i need do it as below:
list_to_binary(binary_to_list(A)++binary_to_list(B)).

<<"abcdef">>

is there a simple method make A+B in binary type?
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