What is happening in this C++ code in C++ (Exponent Function) - c++

Question

 int power(int baseNum, int powNum) {
    int result = 1;
for(int i = 0; i < powNum; i++) {
       result = result * baseNum
}
 return result;
}
 int main()
{
  cout <<power(2 , 3);
   return 0;
It's from this YouTube Video.
So what I don't understand is how he picks int result = 1; out of nowhere? Why not = 2?
Why int i = 0 , why not = 1 ?
In the video part "Let's break it down" he says the first Result is 1
But isn't it 0?
First loop is 0
Next loop is 1
3rd loop is 2
and then it exits because it's 3 < 3
right?
If someone can make a transcription of the loops will be great so I can see exactly what's going on.
And the last thing how we make these calculations result = result * baseNum with the loops so we can get to 8.
I just started learning C++.

Answer 1

So what I don't understand is how he picks int result = 1; out of nowhere? Why not = 2?
That is so it's not always 0 if he multiplies the result in the for loop. 0 * 2 --> 0
About the for loop itself:
Iteration: 1 * 2 --> 2 / i = 0
Iteration: 2 * 2 --> 4 / i = 1
Iteration: 4 * 2 --> 8 / i = 2
Iteration: i = 3 / is not smaller than 3 leaves the for-loop
At the end he leaves the function and returns the result which is now 8.
For the for-loop, getting the the power of 3 with a base of 2, gives back the same as if you would just multiple 2 * 2 * 2.
That is exactly what the for-loop does you go through and do the first multiplication 1 * 2, on the second iteration you calculate you multiply the result again 2 * 2, then you go through again and calculate the next iteration 4 * 2 which then gets you the desired result