I have recently become fairly interested in Camus. I'm not really that familiar with philosophy, but I do know the difference between nihilism and existentialism. I've been wondering what Camus thought about the two in relation to each other.
The difference between nihilism and and existentialism is that nihilism proclaims that there is no meaning, whereas existentialism (mostly) states that each individual must decide their own meaning.
The Myth of Sisyphus written by Camus speaks of rolling a rock up a hill over and over only to have it fall back down. This is an interesting metaphor and Camus' argument against nihilism. The last two lines of the story I have quoted below, but you shoulds really read the entirety in a sitting when you have time.
The struggle itself toward the heights is enough to fill a man's heart. One must imagine Sisyphus happy.