When a scale has a sharp or a flat, it's indicated on the stave with the relevant sign on the relevant line.
But what about when there's another note on a different part of the stave?
For example, on the upper stave of piano music, the bottom space is an F. So is the top line.
So how come, on a particular piece of music that I've been trying to learn, there's a sharp on the F on the top line of the stave, but not on the bottom space F?
I know it's only for the two notes (bottom line E, top space E as well as the two Fs) on the top stave, and the bottom stave (bottom line G, top space G and bottom space A, top line A), but it's confusing my poor aged brain.
If you must have sex with a frog, wear a condom. If you want the frog to have fun, rib it.