You didn't specify the programming language, I'm assumming it's C++ .
#include <iostream>
using namespace std;
int main() {
int r,y; // 'int' is used to declare an integer (whole number)
double s,z; // 'double' or 'float' are used to declare real numbers
bool t,x; // 'bool' is used to declare a boolean value (true/false)
return 0;
}
