Degree refers to the musical interval, which is the pitch difference between two notes.

Intervals of the major scale:

1-2, major second,

2-3, major second,

3 -4, minor second degree,

4-5, major second degree,

5-6, major second degree,

6-7, major second degree Degree,

7-1 (treble), minor second.

"Degree" is the unit for calculating musical intervals, and "interval" is the "distance between sounds." When calculating musical intervals, each sound must be counted as one degree.

For example, do to mi are three degrees

Usually "octave" refers to the pitch that is higher than the original sound. The same sound that is one step higher, for example, do to high do, is the octave interval (do, re, mi, fa, sol, la, si, do, eight tones, so it is an octave).