Question

How to use Array.Aggregate() to applies a function to each int array element in C#

Answer 1

using System;
using System.Linq;
 
class Program {
    static void Main(string[] args) {
        int[] arr = { 1, 2, 3, 4, 5, 6 };
 
        int total = arr.Aggregate((x, y) => y + x);
        // 1 + 2 = 3
        // 3 + 3 = 6
        // 6 + 4 = 10
        // 10 + 5 = 15
        // 15 + 6 = 21
        Console.WriteLine(total);
    }
}
 
 
 
/*
run:
 
21
 
*/

 

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Answer 2

using System;
using System.Linq;

namespace ConsoleApplication_C_Sharp
{
    class Program
    {
        static void Main(string[] args)
        {
            int[] arr = { 1, 2, 3, 4, 5, 6 };

            int total = arr.Aggregate((x, y) => y * x);
            // 1 * 2 = 2
            // 2 * 3 = 6
            // 6 * 4 = 24
            // 24 * 5 = 120
            // 120 * 6 = 720
            Console.WriteLine(total);
        }
    }
}


/*
run:

720

*/

 

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