How many lines are there on a music staff?

A music staff is a set of five horizontal lines that are used to represent musical notes. The staff is the foundation of written music notation and is used by musicians to read and write music.
Each line and space on the staff represents a different pitch or note, and the position of the note on the staff determines its pitch. The lines and spaces are numbered from the bottom to the top of the staff, with the bottom line being the first line and the top line being the fifth line.
So, to answer the question, there are five lines on a music staff. However, the number of lines can vary depending on the type of music being written. For example, percussion music may use a staff with only one line, while choral music may use multiple staves to represent different parts.