Numbering piano

1. What is the numbering in piano?
2. What do the numbers mean on piano sheet music?

What is the numbering in piano?

The piano has a range of 88 keys. It is used as the basis for numbering pitches, beginning with A0 (A zero) and B0 (B zero), followed by 7 octaves from C1 (C one) to C8 (C eight). (Middle C is C4 - C four.)

What do the numbers mean on piano sheet music?

A number is assigned to each finger. The numbers suggest you which fingers to use to play the note or chord.