Difference between lower and upper case chars in CAS and Home

[tiamattia]

Thanks DrD for the answer. For a beginner this can be quite confusing, but as you said, practice will solve the dubts.

Instead, from what i understood about vars (tell me if i'm wrong):
In home view are accepted only names that exist, if the name does not exist, the parser checks if that name should be parsed as a product of existing names.

So if i store 1 in A and 2 in AA, the result of AAA is A*A*A: 8.
So the parser checks single chars vars first then vars with a name made of more chars. If it can't find a combination -> syntax error.

In CAS view instead all names are accepted but existing ones are directly evaluated.