Explain in Detail!

Question

Code:

#include <iostream>
using namespace std;

int main()
{
int num = 1;
int number;
int total = 0;

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

return 0;
}

what does total +=
number mean?
what is its alternative(total += number)

Answer 1

while loops 5 time and every time it loop , it recieve one number from user , every time it recieve new number it sum "total" variable with new number and save it in total
when loop ends it print total value

Answer 2

is this enough or need more explanation ?

Answer 3

it means
total = total + number

Answer 4

it recieve 5 number & calculate them summation

Answer 5

total +=number means what?