Why the output of this is a number?

Question

System.out.print('h'+'i');

Answer 1

Caty Zurano double " would make it a string not a char. The result would be "hi" if it was "h" + "i"

Answer 2

Characters (chars) have integer values and using the + operator on two chars will return the sum of their Integer values

Answer 3

for this read about ASCII characters value

Answer 4

thanks!! is is the same to use simple ' or double" quotes?