A sharp.
F#
The note above F can be labelled as F sharp or G flat.
One half step higher than G sharp is A. In musical terms, a half step is the smallest interval, and moving up from G sharp to A involves raising the pitch by one semitone.
One half step lower than G sharp is G. In musical terms, a half step down means moving to the immediate next note on a keyboard or scale, which in this case is G.
G is half a note higher than F#. The full scale is C C# D D# E F F# G G# A A# B C
F#
One half step above G is G-sharp (or A-flat). In musical terms, this means that if you move up from G to the next closest note, you reach G-sharp/A-flat.
G
Eb/D#
Technically speaking, D sharp major is: D#, E#, F* (F double Sharp,) G#, A#, B#, C* (C double sharp) D#. ***note: a double sharp (*) means that the note sounds a whole step above the principal note. For example: F*=G.
A half step above G. G sharp and A flat are one in the same.
Step 1. Position your fingers for g Step 2. Put your fourth finger on the key it is above You now have g flat (f sharp)
The note above F can be labelled as F sharp or G flat.
G sharp
Being that it's a whole-step away from another sharp or flat note in both directions, there is no possible double-sharp/flat spelling for it.
One half step higher than G sharp is A. In musical terms, a half step is the smallest interval, and moving up from G sharp to A involves raising the pitch by one semitone.
A major third (M3) above F-sharp is A-sharp. To find this, you count four half steps up from F-sharp: G, G-sharp, A, and A-sharp. Therefore, the note that is a major third above F-sharp is A-sharp.