Is there any better way to find the digit multiplication and summation?

Question

int N = 2345;
        var digitArray = N.ToString().ToCharArray();
        int multiplicationSum = 1;
        foreach (char digit in digitArray)
        {
            mu         


        

Answer 1

Assuming you don't need to deal with negative numbers, it seems doing it mathematically would make a lot more sense

int N = 2345;
int multiplicationSum = 1;
while(N!=0)
{
  multiplicationSum = multiplicationSum * (N%10);
  N = N/10;
}
var sum = 0;
while(multiplicationSum!=0)
{
  sum = sum + (multiplicationSum%10);
  multiplicationSum = multiplicationSum/10;
}

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References:

% operator

The % operator computes the remainder after dividing its first operand by its second

/ operator:

When you divide two integers, the result is always an integer. For example, the result of 7 / 3 is 2