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# Alerts
You may wish to display alerts to the user. To do so, raise a `gr.Error("custom message")` in your function to halt the execution of your function and display an error message to the user.
You can also issue `gr.Warning("custom message")` or `gr.Info("custom message")` by having them as standalone lines in your function, which will immediately display modals while continuing the execution of your function. The only difference between `gr.Info()` and `gr.Warning()` is the color of the alert.
```python
def start_process(name):
gr.Info("Starting process")
if name is None:
gr.Warning("Name is empty")
...
if success == False:
raise gr.Error("Process failed")
```
Tip: Note that `gr.Error()` is an exception that has to be raised, while `gr.Warning()` and `gr.Info()` are functions that are called directly.
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