C＃で配列の最後の要素のインデックスを見つける

配列の最後の要素のインデックスを見つけるためのコードは次のとおりです-

例

using System;
public class Demo {
   public static void Main(){
      string[] products = new string[] { "Andy", "Mark", "Gary", "Andre"};
      Console.WriteLine("One or more name begin with 'A'? = {0}",
      Array.Exists(products, ele => ele.StartsWith("A")));
      Console.WriteLine("Is the array having fixed size? = " + products.IsFixedSize);
      Console.WriteLine("Is the array read only? = " + products.IsReadOnly);
      Console.WriteLine("Is the array synchronized? = " + products.IsSynchronized);
      Console.WriteLine("Index of the 1st element = "+products.GetLowerBound(0));
      Console.WriteLine("Index of the last element = "+products.GetUpperBound(0));
   }
}

出力

これにより、次の出力が生成されます-

One or more name begin with 'A'? = True 
Is the array having fixed size? = True Is the array read only? = False
Is the array synchronized? = False Index of the 1st element = 0
Index of the last element = 3

例

別の例を見てみましょう-

using System;
public class Demo {
   public static void Main(){
      string[] products = new string[] { };
      Console.WriteLine("Is the array having fixed size? = " + products.IsFixedSize);
      Console.WriteLine("Is the array read only? = " + products.IsReadOnly);
      Console.WriteLine("Is the array synchronized? = " + products.IsSynchronized);
      Console.WriteLine("Index of the 1st element = "+products.GetLowerBound(0));
      Console.WriteLine("Index of the last element = "+products.GetUpperBound(0));
   }
}

出力

これにより、次の出力が生成されます-

Is the array having fixed size? = True Is the array read only? = False
Is the array synchronized? = False Index of the 1st element = 0
Index of the last element = -1