HelP! x < 4; - False. But - x < 5; - True. Why?

Question

#include <iostream>
using namespace std;
int main()
{
int arr[] = {85, 82, 970, 932, 753};
int sum = 0;
for (int x = 0; x < 4; x++) {
sum += arr[x];
}
cout << sum << endl;
return 0;
}

Answer 1

Please elaborate on your question.