You can use the toolbar at the top to manipulate cells and the kernel. The available functions are annotated as follows:

Verify your output amount before running a cell! A huge output stream doesn't usually kill your console, but it can easily crash your browser and notebook in a matter of seconds. This issue has been addressed since Jupyter 4.2 by stopping large output. However, it does not guarantee to capture all non-stop output. Therefore, readers are advised to exercise caution and avoid attempts to obtain large output results in a notebook cell. Consider slicing it for a glimpse or obtaining output in another file: