Control flow

Controlling when cells run

• Use [mo.stop][marimo.stop] to halt execution of a cell when a condition is met.
• Combine [mo.stop][marimo.stop] with [mo.ui.run_button][marimo.ui.run_button] to gate execution on button click.
• Use [mo.ui.refresh][marimo.ui.refresh] to make cells run periodically.

!!! tip "Lazy execution"

In addition to these utilities, you can [configure the runtime to be lazy](../guides/expensive_notebooks.md#configure-how-marimo-runs-cells), marking cells as stale instead of automatically running them.

::: marimo.stop

Threading

::: marimo.Thread

::: marimo.current_thread