What does a high C look like in music writing?

A high C is one of the highest notes found in vocal and instrumental music. It is generally written as the "C" above middle C, and can be written in either the treble or tenor clef. In the treble clef, it is written on the top line, while in the tenor clef, it is written in the first ledger line above the staff. The note can also be written using a scientific pitch notation as C6, which refers to the sixth C note above middle C.