What is a char, why do I need it, and when do I need to use it ?

Answer 1

char means character
character means 1
sample char 'a' or 'b'

char use a little memory against string variables
char cant null
char can be ++ and --

Answer 2

I

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.

http://www.learncpp.com/cpp-tutorial/27-chars/
https://docs.oracle.com/javase/tutorial/java/data/characters.html
https://docs.microsoft.com/en-us/dotnet/csharp/language-reference/keywords/char