What is the cout << "sum is" << sum?

Question

Is that mean ("sum%d", a);? I only learned C... So it's little bit confuse...

Answer 1

It is like Printf<<"sum is"<<%d ,&sum;
I actually don't remember the syntax. I learned. C. many years ago.
Hope you understand from this.

Answer 2

cout << "Sum is " << sum << endl;

==

printf("Sum is %d\n", sum);

Answer 3

To complete what has been said: cout is the console output stream object. In C++, to print something in the console, you send stuff to cout.

Answer 4

it prints sum is : a value according to the expression