How can I print a PID in Elixir?

When you want to append it to a string (to display some extra details), you can use string interpolation:

pid = spawn(fn -> 1 + 2 end)
IO.puts "Pid: #{inspect pid}"

I found that I'm using the wrong inspect, there is IO.inspect/2 and Kernel.inspect/2. The second works for me:

pid = spawn fn -> 1 + 2 end
IO.puts(inspect(pid))

You don't need to wrap IO.inspect in a call to IO.puts. Simply calling IO.inspect will do what you're looking for.

pid = spawn fn -> 1 + 2 end
IO.inspect(pid)

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