A major, or F# minor
An accidental can be a flat, natural, or sharp, used for a note NOT in the key (such as an F-sharp in C major).
A sharp key signature is one that contains sharps.
It is called a "natural" sign, and it cancels out/naturalizes a sharp or a flat.
If the note F had a sharp accidental in a music piece, then all other F's would be sharp for the rest of the measure, unless there is a natural sign.
A sharp, flat or natural outside the key signature is called an accidental. They are commonly used both for chromatic movement within the song (i.e. sharping the seventh in a minor key when resolving to the first) and for keychanges that will only last a few measures, such as using a run in Csharp to move from C to D.
An accidental is a sharp or flat that is not written in the key signature.
Only "B flat" is the key signature, then "C sharp" is the accidental.
An accidental can be a flat, natural, or sharp, used for a note NOT in the key (such as an F-sharp in C major).
An accidental can be a flat, natural, or sharp, used for a note NOT in the key (such as an F-sharp in C major).
G sharp
G sharp
A sharp key signature is one that contains sharps.
C# Major
Go up a half-step from the last sharp in the key signature.
A double sharp. They look like bold letter 'x'.
Four key signatures have G sharp and E sharp in them: F sharp Major, D sharp minor, C sharp Major and A sharp minor.
An accidental is a sharp or flat that isn't in the key signature. For example, if your key signature says that all f's and c's are sharp, and then a G is sharped somewhere in the music, it would be an accidental.