sum numbers c# code example

Example 1: sum of digits in c#

int num = 123;
int sum = 0;
while(num > 0)
{
  sum += number % 10;
  num /= 10;
}
Console.WriteLine(sum); // output: 6

Example 2: sum array c#

//
        // 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();