Default Parameters Pattern - language feature

function multiply(a, b = 1) {
 return a * b;
}

Example from C#:

public void ExampleMethod(string optionalstr = "default string") {}

Example from Elixir:

def multiply(a, b \\ 1) do
  a * b
end

Example from C3:

fn void test(int x = 10) { ... }

Example from Speedie:

function Find (|string| pattern, |int| pos=0, |int|)

Languages with Default Parameters Pattern include JavaScript, C#, TypeScript, Elixir, C3, Speedie

This question asks: Does the language have a way to define default parameters for functions?

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