Papillon6814
In Elixir, if executes a do…end block unless the given condition is false or nil as you know.
iex(1)> if true, do: IO.puts("ok")
ok
:ok
iex(2)> if 3, do: IO.puts("ok")
ok
:ok
iex(3)> if false, do: IO.puts("ok")
nil
iex(4)> if nil, do: IO.puts("ok")
nil
iex(5)> if "ok", do: IO.puts("ok")
ok
:ok
I’d like to know how to check whether the given argument for if is true. The only way I thought out for checking it is below.
if a == true, do: IO.puts("ok")
I feel a == true is somehow weird, are there any better ways to check true?
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Papillon6814
Thank you. I will do
a == truein Elixir!kip
In Elixir, with the exception of guards, the principle is of
truthyness meaning that for boolean comparisons,nilandfalseare considered false and everything else is true.Meaning if you truly want to check for the atom
trueyou will need to doa == trueas you are doing. The valuestrue,falseandnilare just atoms in Elixir, nothing more.