I am taking a basic MATLAB course.
Among them, there is a command to get the month name corresponding to the number stored in the variable. (MATLAB Basic 5.12 2/3 Natick Hourly Temperature Data Task 3)
See below.

A = 12
B = m (A)

B = ('Dec')

Is this a command like this?
doc m
Even if I refer to the documentation, it does not appear, and where can I find such commands?

doc month
I'm not sure even if I look at it.

I am sorry that the question is difficult to understand.
It will be moyamoya, so I would appreciate it if you could answer.