Call a function: Difference between revisions

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 # a function's arity is a property of its behavior and not
 # of its definition</lang>
+=={{header|Elixir}}==
+<lang elixir>
+# Anonymous function
+foo = fn() ->
+  IO.puts("foo")
+end
+foo()  #=> undefined function foo/0
+foo.() #=> "foo"
+# Using `def`
+defmodule Foo do
+  def foo do
+    IO.puts("foo")
+  end
+end
+Foo.foo    #=> "foo"
+Foo.foo()  #=> "foo"
+# Calling a function with a fixed number of arguments
+defmodule Foo do
+  def foo(x) do
+    IO.puts(x)
+  end
+end
+Foo.foo("foo") #=> "foo"
+# Calling a function with a default argument
+defmodule Foo do
+  def foo(x \\ "foo") do
+    IO.puts(x)
+  end
+end
+Foo.foo()      #=> "foo"
+Foo.foo("bar") #=> "bar"
+# There is no such thing as a function with a variable number of arguments. So in Elixir, you'd call the function with a list
+defmodule Foo do
+  def foo(args) when is_list(args) do
+    Enum.each(args, &(IO.puts(&1)))
+  end
+end
+# Calling a function with named arguments
+defmodule Foo do
+  def foo([x: x]) do
+    IO.inspect(x)
+  end
+end
+</lang>
 =={{header|Erlang}}==