When to use an assertion and when to use an exception

Question

Most of the time I will use an exception to check for a condition in my code, I wonder when it is an appropriate time to use an assertion?

For instance,

Answer 1

You can use this simple difference in mind while their usage. Exceptions will be used for checking expected and unexpected errors called checked and unchecked error while assertion is used mainly for debugging purposes at the run time to see whether the assumptions are validated or not.