Partially understand loop. I'm confused.

Question

int num = 1;
int number;
int total = 0;

while (num <= 5) {
cin >> number;
total += number;
num++;
}
cout << total << endl;

Answer 1

In my mind, it looks like I enter a number, say 5, and it keeps adding 5 to your number 5 times. But why?

What I'm seeing is you add total (0) to your number (5). Is it num++ that makes it add your input to itself five times? if so, how if num is already declared to be 1 and '++' adds one to it?