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"The" is a definite article which is often translated as "el", and "then" is an adverb which is often translated as "entonces". Learn more about the difference between "the" and "then" below.
the()
A definite article is a word that identifies a noun as specific or known to the speaker (e.g., the girl).
1. (general)
c. los (plural, masculine)
I like all the dresses in the store.Me gustan todos los vestidos de la tienda.
then()
An adverb is a word that describes a verb, an adjective, or other adverbs (e.g., to run quickly, very tired).
a. entonces
If you eat healthy food, then you won't get sick.Si comes comida sana, entonces no te enfermarás.