Why is there an infinite loop in my program?

Question

int main(void)
{
    int i;
    int array[5];

    for (i = 0; i <= 20; i++)
    array[i] = 0;

    return 0;
}

Why is the above code stuck in a

Answer 1

The problem is when you try to access an element outside the bounds of the array, which is only 5 big - but in a loop that is 21 big.

int main(void)
{
    int i;
    int array[5];

    for (i = 0; i < 5; i++)
    array[i] = 0;

    return 0;
}