C# Enumerable Sum(IEnumerable>)
Description
Computes the sum of a sequence of nullable Int64 values.
Syntax
public static Nullable<long> Sum(
this IEnumerable<Nullable<long>> source
)
Parameters
source- A sequence of nullable Int64 values to calculate the sum of.
Example
The following code example demonstrates how to use Sum(IEnumerable) to sum the values of a sequence.
/* w ww . ja v a 2 s . c om*/
using System;
using System.Linq;
using System.Collections.Generic;
public class MainClass{
public static void Main(String[] argv){
long?[] points = { null, 10, };
long? sum = points.Sum();
Console.WriteLine("Total points earned: {0}", sum);
}
}
The code above generates the following result.
