Add the correct data type for the following variables:
@(3) myNum = 9;
@(6) myDoubleNum = 8.99;
@(4) myLetter = 'A';
@(4) myBool = false;
@(6) myText = "Hello World";
int myNum = 9;
double myDoubleNum = 8.99;
char myLetter = 'A';
bool myBool = false;
string myText = "Hello World";