Adding char and int

Question

To my understanding a char is a single character, that is a letter, a digit, a punctuation mark, a tab, a space or something similar. And therefore when I do:

Answer 1

'1' is a digit, not a number, and is encoded in ASCII to be of value 49.

Chars in Java can be promoted to int, so if you ask to add an int like 1 to a char like '1', alias 49, the more narrow type char is promoted to int, getting 49, + 1 => 50.

Note that every non-digit char can be added the same way:

'a' + 0 = 97
'A' + 0 = 65
' ' + 0 = 32