int num = 123; int sum = 0; while(num > 0) { sum += number % 10; num /= 10; } Console.WriteLine(sum); // output: 6
int[] arr = new int[] { 1, 2, 3 }; int sum = 0; for (int i = 0; i < arr.Length; i++) { sum += arr[i]; } int[] arr = { 3, 6, 4, 1, 6, 8 }; // returns 1 Array.IndexOf(arr, 6); int maxValue = anArray.Max(); int maxIndex = anArray.ToList().IndexOf(maxValue);
// // Declare two collections of int elements. // int[] array1 = { 1, 3, 5, 7 }; List<int> list1 = new List<int>() { 1, 3, 5, 7 }; // // Use Sum extension on their elements. int sum1 = array1.Sum(); int sum2 = list1.Sum();