I am trying to learn the piano and I am a bit confused when it comes how sharp notes are represented in the sheet.
I am working my way through Prelude I in C Major (BWV 846), and in the sixth bar/measure my sheet looks like this
To me, that looks like I am supposed to play
F# A D F A D F A D F A D
but I think it's actually supposed to be this
F# A D F# A D F# A D F# A D
Am I playing it right by playing it as all the Fs being sharp, and if so, how can I tell from the sheet that they are sharp if only the first one has the #?