Update choice field programmatically

Hi,

How to update a choice field?

I have a choice field(dropdown) in my custom list, which has the value as "Start", "In Progress", "End".

I would like to update the list items which have the value as "In Progress" to "End" programmatically.

Is the below code correct. I have not got any errors, however would like to know if the below is proper. I have not provided the condition in the below code, however the update code i have added

myListItem["ChoiceField"] = myList.Fields["ChoiceField"].GetFieldValue("End");
myListItem.Update();
myList.Update();

Thank you