Batch size and weight updates

Could you clarify this question.

I have Epoch of 1000 and Batch size 100. (Then 1 epoch will be 10 batch sizes).

May I know when will the weights get updated. WIll it update for every batch size or at the end of every epoch.

Thanks

(Editing) This will update the weights at end of every epoch.

For details, follow this answer:

https://stats.stackexchange.com/questions/117919/what-are-the-differences-between-epoch-batch-and-minibatch