The size of first dimension (first index) is optional in array initialization. Explain

Question

The size of first dimension (first index) is optional in array initialization. Explain

Answer 1

In declaring an array as array[] as opposed to array[10], the first option creates an array just big enough for initialization. The second, creates an array size = 10, regardless of what you initialize it to, even if it's empty. Hope that helps. If you need dynamic arrays, look into vectors.