When to use a comma after "for instance":
* When "for instance" introduces an example within a sentence:
* "I like many fruits, for instance, apples, oranges, and bananas."
* "The store was filled with delicious smells, for instance, fresh bread and cinnamon."
* When "for instance" is followed by a list:
* "There are many ways to prepare this dish, for instance, baking, frying, or grilling."
* "The museum has several interesting exhibits, for instance, ancient artifacts, modern art, and dinosaur fossils."
When not to use a comma after "for instance":
* When "for instance" is at the end of a sentence:
* "This is a very challenging task, for instance."
* "I need to learn more about this topic, for instance."
Important Note:
* "For instance" can also be used at the beginning of a sentence. In this case, a comma is not necessary.
* "For instance, I like to read books."
* "For instance, this is a great idea."
Overall:
Think about the flow of your sentence and whether "for instance" is introducing an example or list. If so, a comma is usually necessary. If it's at the end of a sentence, you don't need a comma.