Print 'Hello World!' text.
none.
#include <iostream>
int main(int argc, char* argv[]) {
std::cout << "Hello World!" << std::endl;
return 0;
}
the 'cout' keyword is in the 'std' namespace, so 'std::' mean is using 'std' namespace.
'<<' is input. so the "Hello World!" text is input to 'std::cout'.
'std::cout' executes print out the "Hello World!" text.
'std::endl' is write 'new-line' character and flush buffer.
Hello World!
#cout #echo #helloworld #printf