# Not

`type` in `services` · v0.8.2

<https://docs.seedcord.org/packages/services/0.8.2/types/not>

Returns a boolean for whether A is false.

## Examples

```ts
type A = Not<true>;
//=> false

type B = Not<false>;
//=> true
```

## Declaration

```ts
type Not<A extends boolean> = A extends true
    ? false
    : A extends false
      ? true
      : never;
```