There are 7 octaves plus 4 keys for each piano keyboard, each octave contains 7 white keys and 5 black keys.
The white key in front of the the two black keys in each octave is C
There are 7 octaves plus 4 keys for each piano keyboard, each octave contains 7 white keys and 5 black keys.
The white key in front of the the two black keys in each octave is C