how to cout in c 2b 2b

1#include <iostream>
2
3using namespace std;
4
5int main()
6{
7	int a,b;
8	char str[] = "Hello Programmers";
9	
10	/* Single insertion operator */
11	cout << "Enter 2 numbers - ";
12	cin >> a >> b;
13	cout << str;
14	cout << endl;
15	
16	/* Multiple insertion operator */
17	cout << "Value of a is " << a << endl << "Value of b is " << b;
18	
19	return 0;
20}

1std::cout << "Hello World!" << std::endl; //Or you can do
2std::cout << "Hello World!" <<; //Only in some scenarios 

1#include <iostream>
2
3int main(){
4  std::cout << "Hello World!" << std::endl; // prints "Hello World"
5}