What does it mean

by round to the nearest degree.

Rounding up to the nearest degree is equivalent to rounding up to the nearest whole number (or integer)

Step-by-step explanation:

Any value between degrees above. 5 is rounded up to the next degree, so for instance:

30.4 - -> 30

30.5 - -> 31

30.999 - -> 31

31 - -> 31

31.499 - -> 31