default

The catch-all arm of a match: default => ….

It matches anything the earlier arms did not. It must be a whole arm: a whole-arm _ => is an error (_ only works inside a payload, such as Option::Some(_)). A match can have one default.

fn status_text(int status) -> string {
    return match status {
        200 => "ok",
        404 => "missing",
        default => "other",
    };
}

See also#

• fn: Declares a function, a method, or (written in an expression) an anonymous function.
• let: Declares a mutable local variable.
• const: Declares a binding that cannot be reassigned: a local, a module constant, or a class field that is set only by new.
• static: Declares a module-level or class-level slot shared by the whole program, or a method without self.
• readonly: A read-only view of a value: nothing reachable through it can be changed.
• if: Runs a block when a bool condition is true.
• else: Introduces the branch of an if that runs when its condition is false (or its pattern does not match).
• while: Repeats a block while a bool condition is true.