C# square every digit of a number

//c#  square every digit of a number 
public static int SquareDigits(int n)
        {
            var val = n.ToString();

            var result = "";

            for (var i = 0; i < val.Length; i++)
            {
                char c = val[i];
                int num = int.Parse(c.ToString());
                result += (num * num);
            }
            return int.Parse(result);
        }
  ------------------------------------------------Option 2
  public static int SquareDigits(int n)
        {
            var result =
         n
        .ToString()
        .ToCharArray()
        .Select(Char.GetNumericValue)
        .Select(a => (a * a).ToString())
        .Aggregate("", (acc, s) => acc + s);
            return int.Parse(result);
        }
-------------------------------------------------option 3
public static int SquareDigits(int n)
        {
            List<int> list = new List<int>();
            while (n != 0)
            {
                int remainder = n % 10;
                n = n / 10;
                list.Add((remainder * remainder));
            }
            return int.Parse(String.Join("", list.ToArray()));
        }

Similar codes

1 vote171 views1 answer
Hide button unity
C#
2 votes176 views1 answer
Unity unparent
C#
0 vote194 views1 answer
How to get angular on visual studio mac
C#
40 votes173 views5 answers
C# MessageBox
C#
1 vote175 views1 answer
Orderby c# randomize
C#
0 vote188 views1 answer
How to pass id from view to controller in asp.net core
C#
0 vote228 views1 answer
C# see if list contains any duplicates
C#
1 vote179 views1 answer
C# unity choose key input
C#
0 vote168 views1 answer
Windows forms webbrowser goforward
C#
1 vote181 views1 answer
C# read array of objects from formdata
C#