[API reference](https://evolu.dev/docs/api-reference) › [@evolu/common](https://evolu.dev/docs/api-reference/common) › [BigInt](https://evolu.dev/docs/api-reference/common/BigInt) › decrementBigInt

```ts
function decrementBigInt(n: bigint): bigint;
```

Defined in: [packages/common/src/BigInt.ts:13](https://github.com/evoluhq/evolu/blob/dd96d79f1dbe9a49fa12ce8e0aa7d3d0177795ca/packages/common/src/BigInt.ts#L13)

Decrements a bigint by 1.