What is the proper usage of then and than?

Question

What is the proper usage of then and than?

Answer 1

than is used in a comparison, then is used as a time marker or for a sequence of events

example

he is taller THAN me

the students read less THAN I do

other THAN his job, he has no source of income

look at the study guide, THEN take the test

back THEN we knew what to do

I used to run a lot, but I was in better shape THEN

Answer 2

With "then", there is a time or sequence involved.

ex: We're going to dinner, and then to the movies.

ex: If you want to go with us, then give us a call.

"Than" is used with a comparison.

ex: Bob is taller than Joe.

ex: I would rather stay home than go to school today.  

Answer 3

then is used when speaking about time.

than is used in comparing objects.