[API reference](https://evolu.dev/docs/api-reference) › [@evolu/sqlite-wasm](https://evolu.dev/docs/api-reference/sqlite-wasm) › NullPtr

```ts
type NullPtr = 0;
```

Defined in: [packages/sqlite-wasm/src/Pointer.ts:32](https://github.com/evoluhq/evolu/blob/bc4578a260dd15d5bbf94b83765ca05984d194cb/packages/sqlite-wasm/src/Pointer.ts#L32)

The C NULL pointer.

Functions that can return NULL include it in their result type, and a `=== 0`
check narrows it away.