Not able to see collection

MongoDB University M001: MongoDB Basics
#1

show collections not showing any collections

#2

Which cluster and which DB?
Have you created the collection or checking for existing collections?
Can you paste command you used
show db

#3

When you use the database, have you cased the database name correctly?

This works:

use 100YWeatherSmall

This doesn’t:

use 100yWeatherSmall

(I made exactly that mistake yesterday)

#4

yes. i done the same mistake