Erlang Hello World Example How To Write Compile and Execute Erlang Program on Linux

in This tutorial you will learn How To " Erlang Hello World Example: How To Write, Compile and Execute Erlang Program on ubuntu Linux "
Erlang is a programming language used to build massively scalable soft real-time systems with requirements on high availability. Erlang runtime system has built-in support for concurrency, distribution and fault tolerance

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Sir, I get crash error:

{"init terminating in do_boot", {undef, [{helloworld, start, [], []}, {init, start_em, 1, []}, {init, do_boot, 3, []}]}}
init terminating in do_boot ({undef, [{helloworld, start, [], []}, {init, start_em, 1, []}, {init, do_boot, 3, []}]})

Crash dump is being written to: erl_crash.dump...done