Using 'THAN' and 'THEN'

Dear class,
Ever wondered how to differentiate between the words 'THAN' and 'THEN'?
There are some of us who are confused when to use these 2 words.
Their meanings are different.
From the dictionary, 'THAN' is used as a "function word to indicate difference of kind, manner, or identity; used especially with some adjectives and adverbs that express diversity 2 : rather than -- usually used only after prefer, preferable, and preferably3 : other than"

In simple words, 'than' is used for comparison betweeon people, things, or objects.

As for 'THEN', the meanings are "1 : at that time2 a : soon after that : next in order of time b : following next after in order of position, narration, or enumeration : being next in a series c : in addition : BESIDES 3 a (1) : in that case (2) -- used after but to qualify or offset a preceding statement b : according to that : as may be inferred c : as it appears : by way of summing up d : as a necessary consequence "

In simple words, 'then' is used when there's something to be added on to a sentence or information.

Do go through these meanings and usage of words carefully and use them appropriately in English, Maths and Science.