No. Accidentals (sharps # or flats b) will be indicated in the key signature at the beginning of a piece. Extra accidentals (not in key signature) MUST have their signs before the note. But if it's in the key signature, not required.
Also, double sharp (looks like an x) can be used.
Sharps and flats are always on the left of the note.
If you are refering to music, the sign for sharp is #
That is the sharp sign, sharps raise a note by a half-step.
To find and deal with sharps, such as needles or other sharp objects, always use gloves and a puncture-proof container. Never touch sharps with bare hands. Dispose of sharps in a designated sharps container to prevent injury and contamination.
A natural sign cancels out any sharps or flats on a note, returning it to its original pitch.
If by sign you mean key signature than it would be 2 sharps: F# and C#. DEF#GABC#D
A major has 3 sharps, A minor has no sharps or flats.
It means the note should be played as written disregarding the key sign. Also, by convention, sharps and flats are "sticky" within a measure; the natural sign resets those as well.
Sharps
Christian Sharps.
The Key of Ab does not have any sharps naturally written in it. It has four flats.
It depends on which key signature. D major has 2 sharps. F# major has 6 sharps. Bb major has no sharps.