Please answer this i want to know answer

Question

int arr[] = {11, 35, 62, 555, 989};
int sum = 0;

for (int x = 0; x < 5; x++) {
sum += arr[x];
}

cout << sum << endl;
//Outputs 1652

How this output will come can anyone tell me

Answer 1

"arr" is array containing integer values. every value of array has his index starting from zero [0]
arr[0] is 11, arr[1] is 35 etc.
so sum = 0 and x = 0,
at first iteration of for it looks like this
sum = sum + arr[0] = 0 + 11 = 11
at second time x increments by 1 for the second loop, so x = 1 and it < 5, loop continues
sum = sum + arr[1] = 11 + 35 = 46 ... etc..
at the end we get the sum of all numbers in array.

P.S. val += 1 is a short way of val = val + 1

Answer 2

I think what you really want to do is this:

#include <iostream>
#include <array>

int main()
{
std::array<int, 5> arr = { 11, 35, 62, 555, 989 };

int sum{};
for (const int x : arr)
sum += x;

std::cout << sum << std::endl;
}

Tell me if you don't understand something.