Question

What is the difference between the following three statements?
cout<<'A';
cout<<"A";
cout<<A;

Answer 1

cout<<'A'; // prints letter A on screen of type "char"
cout<<"A"; // prints letter A on screen of type "string"
cout<<A; // prints the value of "variable" A on screen

char type variable can hold only single character 
string type can hold multiple characters
There are different types of variables like (int, bool, char, string, double and other)