Determiners - All, alla, allt!
Lastly, there are the words all, alla and allt. They are used to indicate all of something. By now, you've probably guessed it right, and indeed these also have to agree in gender or number with the noun, giving us:
All mjölk/mjölken "all (the) milk", en-word
Allt smör/smöret "all (the) butter", ett-word
Alla bilar/bilarna "all (the) cars", plural
Just like någon/något/några, they can also be used on their own as pronouns, in which case:
alla means everyone.
allt means everything.
And just like with någonting, there is the word allting, which means the same as allt, but is a bit more formal.
You'll learn more about the forms of these words and a few more in these exercises. Good luck!