C# – Sum List having some null

In my apps I will need to handle null value in a list.

Is there a way to do a sum in a foreach without using an if statement to check if an item is null in the list.

List<int?> numberList = new();
numberList.Add(32);
numberList.Add(21);
numberList.Add(null);
numberList.Add(11);
numberList.Add(89);
int? result = 0;
    
foreach (var item in numberList)
{
    if (item != null)
    {
        result += item;
    }   
}
Console.WriteLine($"with if statement Value is : {result}");

>Solution :

Is there a way to do a sum in a foreach without using an if statement
to check if an item is null in the list.

Sure, you could use GetValueOrDefault:

foreach (var item in numberList)
{
    result += item.GetValueOrDefault(); 
}

But then you lose the information if there was at least one item != null, because you’d treat a null item same as an item that is 0. Of course you can shorten code with LINQ:

int result = numberList.Sum(i => i.GetValueOrDefault());