Elixir runs on the BEAM (Erlang VM). The interactive shell is iex. Script files often use the .exs extension; compiled modules use .ex.
Elixir · Lesson 1 · On the house
Hello, Elixir
iex, IO.puts, .exs scripts. Lesson 1 is free — on the house.
Lessons · Elixir · Lesson 1 of 10 · On the house
Hello, Elixir
iex, IO.puts, .exs scripts.
IO.puts/1 writes a value to standard output and appends a newline. Strings are UTF-8 binaries; "hello" is a valid string literal.
In iex, expressions are evaluated immediately. You can also run a script with elixir hello.exs from the shell without compiling a Mix project first.
Elixir is case-sensitive. Module names are typically CamelCase atoms under the hood; function and variable names use snake_case.
Misses: writing println (that is Kotlin/Java), using print from Python, or saving a module file as .exs when you meant a compiled .ex module for Mix.
hello
IO.puts("hello")Quiz
Which call writes a line with a trailing newline in Elixir?
Quiz
What is Elixir's interactive shell called?
Quiz
Which extension is common for Elixir script files?
Quiz
What virtual machine does Elixir run on?
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