string[] array = new string[2]; // creates array of length 2, default values
string[] array = new string[] { "A", "B" }; // creates populated array of length 2
string[] array = { "A" , "B" }; // creates populated array of length 2
string[] array = new[] { "A", "B" }; // created populated array of length 2
int[] rank = new int[5];
int[] rank = { 1, 2, 3,4,5};
int[] rank = { 1, 2, 3,4,5};
int [] rank = new int[5] { 1, 2, 3, 4, 5};