Array

Question

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

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

//output 1652

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

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

//output 990
why not 1656

Answer 1

sum = value;

// assigns value to sum.

sum += value;

// adds value to sum.

Answer 2

sum = arr[x];

This will set the sum equal to value at the index x. So sum is set to 11 then incremented:
sum++;
So now sum is equal to 12. Then sum is set to arr[ 1 ], which is 35 then incremented to 36. Eventually sum is set to 989 then incremented to 990.

I hope that makes sense. Happy coding!