Probably the best thing to do is remember what 'A' and 'a' are. As long as you can remember those, you can derive the rest, but you're not going to be asked a question like, "What is the ASCII value of 'q'?" on the exam. If it is important that you know what a character's value is, the exam will give you that information
I would like to include '0'-'9' numbers also for the above 'A' and 'a'. Because
char c=\u0030; works fine but not
char c=\u0040;
Please observe the missing single quotes around the unicode chars above.