A sharp, also known as B flat.
C#/Db is a half step above C.
B sharp if it is one and a half step up, but if just half then it is A sharp. -BJ
C natural
It is a note a half step above or below the original note (a sharp or flat).
In the treble clef, the note that is one step above the note A is B, while the note one step below A is G. In musical terms, a step typically refers to a whole or half step, with A to B being a whole step and A to G being a half step.
The note above F can be labelled as F sharp or G flat.
B (B natural).
It is usually written just to the right of the note. A sharp means to raise one half step and flat means to lower one half step.
A whole step above C sharp (C#) is D sharp (D#). In music, a whole step consists of two half steps, and moving from C# to D# involves skipping the note D, which is a half step above C#.
Sharp (usually a half step above the natural note)
It lowers the note by one half-step/semitone.
it makes the note a half step higher