Various

#include <iostream> // for cout 
using namespace std; //standard namespace

// single line comment

/*
multi
line
comments
*/

int main(){

        //https://en.cppreference.com/w/c/types/limits
        cout<<"hello"<<endl;
        int i(-1);
        i=2147483647; //biggest int
        i=-2147483648; //smallest int
        cout<<i<<endl;
        unsigned int ui(1);
        ui=4294967295; //biggest unsigned int
        ui = 0; //smallest unsigned int
        cout<<ui<<endl;
        long int l(999999999);
        short s(9);
        float f(-15.5);
        double d(9.11e-33);
        long double ld(4.4);
        char c('A');
        char c2(65);
        unsigned char uc(255);
        bool b(false); //0
        bool b2(true); //1 or
        bool b3(88); //anything other than 0 is true

        cout << "int "<<sizeof(i)<<endl;
        cout << "long "<<sizeof(l)<<endl;
        cout << "unsigned int "<<sizeof(ui)<<endl;
        cout << "short "<<sizeof(s)<<endl;
        cout << "float "<<sizeof(f)<<endl;
        cout << "double "<<sizeof(d)<<endl;
        cout << "long double "<<sizeof(ld)<<endl;
        cout << "char "<<sizeof(c)<<endl;
        cout << "char c2 = "<< short(c2) <<" with a size of "<<sizeof(c2)<<endl;
        cout << char(67)<<endl;
        cout << "unsigned char"<<short(uc)<<"  "<<sizeof(uc)<<endl; //casting
        cout << "bool size "<<sizeof(b)<<endl;
        cout << "bool b2 "<<b2<<"    b "<<b<<endl;

        return 0;

}