[erlang-questions] Variables and side-effects

[Tyron Zerafa]

I have been reading about Erlang and I am finding a problem grasping the
meaning of some terms related to variables.

What do global, free and unbound variables stand for in Erlang? Do they
mean the same thing?

Is there a notion of global/free/unbound variables in Erlang? For instance,
can I somehow implement this lambda: λy ->* *x+y+1 ?

If Erlang does not support global/ free/unbound variables, can we say that
a function does not have side-effects?

Thanks :)
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