static void Main(string[] args)
{
System.Index last = ^ 1;
int[] scores = new int[5];
scores[0] = 80;
scores[1] = 74;
scores[2] = 81;
scores[^ 2] = 90;
public void test_index1_string()
{
string s = "hello";
// using System.Index
var firstIndex = new System.Index(0, false);
var lastIndex = new System.Index(1, true); // long for ^1
Assert.Equal('h', s[firstIndex]);
Assert.Equal('o', s[lastIndex]);
// using array index
Assert.Equal('h', s[0]);
Assert.Equal('o', s[^ 1]);
public Range(Index start, Index end)
{
Start = start;
End = end;
}