Averages/Arithmetic mean: Difference between revisions

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 =={{header|C sharp|C#}}==
-<lang csharp>static double Average(int[] numbers)
+<lang csharp>
+using System.Linq;
-{
-    if (numbers == null || numbers.Length == 0)
-        return 0;
-    double sum = 0;
+static double avg(ICollection<int> i)
+{
-    for (int i = 0; i < numbers.Length; i++)
-        sum += numbers[i];
+    if (i.Length == 0 || i == null) return 0;
-    return sum/numbers.Length;
+    return i.Sum() / (double)i.Count;
 }
-static void Main()
+static void Main(string[] args)
+{
+    int[] numbers = new int[] {1, 2, 3, 4, 5, 6, 7, 8};
+    Console.WriteLine(avg(numbers));
+}</lang>
+C# already has a builtin Average function.
+<lang csharp>static void Main(string[] args)
 {
-    int[] numbers = { 1, 2, 3, 4, 5, 6, 7, 8 };
+    int[] numbers = new int[] {1, 2, 3, 4, 5, 6, 7, 8};
-    Console.WriteLine(Average(numbers));
+    Console.WriteLine(numbers.Average());
 }</lang>