hi im new to programming, started only a few days ago, so i don't know most of the definitions or jargon!

but iv got a a asisignment where i have to a daily total and add it to the weekly total if that makes sense?

basically

weekTotal = 0 + dailyTotal

now i know thats not the proper way beacause it resets each time. what i wana do is

weekTotal = weekTotal + dailyTotal

but i dont know how to do it! i read something online about using += to do it but when i do i get end of statement expected.
what do i do?