There are two types of Articles in Portuguese: Indefinite articles and Definite articles.
<aside> 💡 Notice that in Portuguese it doesn't matter if the noun starts with a vowel or consonant but if it is Masculine or Feminine
</aside>
A mulher (The woman) - Ends with r
O lápis (The pencil) - Ends with s
O amor (The love) - Ends with r
O celular (The cell phone) - Ends with r
O final (The end) - Ends with l
O homem (The man) - Ends with m
O kiwi (The kiwi) - Ends with i
O sol (The sun) - Ends with l