Lesson #1

namespace MyNamespace
{
    class MyClass
    {
        static void Main(string[] args)
        {
            // Array Initializing

            // 9, 6, 0, 2, 3
            int[] arr1 = new int[5];

            // Access array index method #1
            arr1[0] = 9;
            arr1[1] = 6;
            arr1[2] = 0;
            arr1[3] = 2;
            arr1[4] = 3;

            // Access array index method #2
            int[] arr2 = new int[5] { 9, 6, 0, 2, 3 };

            // Access array index method #3
            int[] arr3 = { 9, 6, 0, 2, 3 };

            float f1 = 4.7f; // FLOAT TYPE <=> FLOAT VALUE
            double d1 = 4.7f; // DOUBLE TYPE <=> FLOAT VALUE

            float f2 = 4.7; // ERROR! FOAT TYPE <=> DOUBLE VALUE
        }
    }
}