Is it possible to define optional arguments within functions in Rust? -

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Whether correction allows for alternative function arguments, which I can set to some default value, such as pattern matching or Some other mechanisms?

Not technically, but you can close the option enum Always available to get the same effect: 

  fn opt_arg (i: option ) {match i {some (x) = & gt; {Println! ("Understand {}", x); }, None = & gt; {Println! ("Nothing found"); }}} Fn Main () {opt_arg (none); // none found the opt_group (some (2i)); // got 2}

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