In French, there are three kinds of articles (small words you can only use with nouns): definite, indefinite, and partitive. The purpose of an article is to present a noun and indicate its gender and number. This chart represents articles and how to use them in French writing and language:

Gender/Number Definite (the) Indefinite (a, an, some) Partitive (some, any)
Masculine singular le un du
feminine singular la une de la
plural les des des