_ (wildcard pattern)
Also written: catch-all, underscore pattern
In a `match`, `_` matches anything not covered by earlier arms, so it is put last. In a `for` loop, `_` names a variable you don't need.
Also written: catch-all, underscore pattern
In a `match`, `_` matches anything not covered by earlier arms, so it is put last. In a `for` loop, `_` names a variable you don't need.