Created foreach loop

gradebook/src/GradeBook/Program.cs

@@ -6,6 +6,16 @@ namespace GradeBook
     {
         static void Main(string[] args)
         {
+            var numbers = new[] {12.7, 10.3, 1.1};
+            double result = 0;
+
+            foreach (var number in numbers)
+            {
+                result += number;
+            }
+
+            System.Console.WriteLine(result);
+
             if (args.Length > 0)
             {
                 Console.WriteLine($"Hello, {args[0]}!");