If you don’t take care, and don’t stir, spaghetti might stick badly.
If you have enough water, hot enough, salt a bit, see to it that when you put the pasta in the water it’s not in a big lump, then it’s going to be okay.
I like to stir after a minute or three, but it’s mostly to see everything is okay like water temp.
Beginners might chuck it in colderer water, not stir spaghetti or whatever. Been there done that ☺️