# Cast Vote

Cast a vote on a proposal. The account's voting weight is determined by the number of votes the account had delegated to it at the time the proposal state became active.

**Governor Bravo**

```
function castVote(uint proposalId, uint8 support)
```

* `proposalId`: ID of a proposal in which to cast a vote.
* `support`: An integer of 0 for against, 1 for in-favor, and 2 for abstain.
* `RETURN`: No return, reverts on error.

**Solidity**

```
GovernorBravo gov = GovernorBravo(0x123...); // contract address
gov.castVote(proposalId, 1);
```

**Web3 1.2.6**

```javascript
const tx = gov.methods.castVote(proposalId, 0).send({ from: sender });
```