Keywords ======== {{#include ../links.md}} The following are reserved keywords in Rhai. | Active keywords | Reserved keywords | Usage | Inactive under feature | | -------------------------------------------------------------------------- | ---------------------------------------------------------- | ----------------------------------- | :----------------------------: | | `true`, `false` | | [constants] | | | [`let`][variable], [`const`][constant] | `var`, `static` | [variables] | | | `is_shared` | | _shared_ values | [`no_closure`] | | | `is` | type checking | | | [`if`], [`else`][`if`] | `goto` | control flow | | | [`switch`] | `match`, `case` | switching and matching | | | [`do`], [`while`], [`loop`], `until`, [`for`], [`in`], `continue`, `break` | | looping | | | [`fn`][function], [`private`], `is_def_fn`, `this` | `public`, `protected`, `new` | [functions] | [`no_function`] | | [`return`] | | return values | | | [`throw`], [`try`], [`catch`] | | [throw/catch][`catch`] [exceptions] | | | [`import`], [`export`], `as` | `use`, `with`, `module`, `package`, `super` | [modules] | [`no_module`] | | [`global`] | | automatic global [module] | [`no_function`], [`no_module`] | | [`Fn`][function pointer], `call`, [`curry`][currying] | | [function pointers] | | | | `spawn`, `thread`, `go`, `sync`, `async`, `await`, `yield` | threading/async | | | [`type_of`], [`print`], [`debug`], [`eval`], `is_def_var` | | special functions | | | | `default`, `void`, `null`, `nil` | special values | | ```admonish warning.small Keywords cannot become the name of a [function] or [variable], even when they are [disabled][disable keywords and operators]. ```