about array

Question

am always confusion

Answer 1

Arrays hold several values (usually of the same type, but that's not the case in javascript), accessible by their index number. Indexing starts at 0 (so if arr is an array, arr[0] is the first element, arr[1] the second, etc.).

Answer 2

contrary to a variable which holds one item at a time, an array is like a container which can hold several items.