Examples: 1, -1, -2.5, 'a', "Hello", NULL
The ++ in C++ refers to the postfix increment operator (operator++()). It's literal meaning is "the successor to C", in reference to the C language upon which the C++ language is based.
As string-literal: const char head [] = "<H1>Example</H1>";
a named constant is pretty much the same thing as a literal constant, except it is a name. both cannot change. literal constants are numbers, named constants are words. tada!
in 5ac, a and c are called literal coefficient....
a -- identifier 'a' -- character-literal "a" -- string-literal
int a; -- variable definition"int a" -- string literal
integer literal
b+b+b+c+c+c+c =3b+4c
c + c + 2c + c + c = 6c
a string constant
b + b + b + c + c + c + c = 3b + 4c
4c