Question

How to count specific element in list with C#

Answer 1

using System;
using System.Linq;
using System.Collections.Generic;

class Program
{
    static void Main() {
        var list = new List<int>() { 2, 6, 1, 5, 8, 1, 1, 0, 9, 1 };
        
        int count = list.Count(e => e == 1);

        Console.WriteLine(count); 
    }
}




/*
run:

4

*/

 

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Answer 2

using System;
using System.Collections.Generic;

class Program
{
    public static int CountElement(List<int> list, int element) {
        int count = 0;
        
        foreach (var e in list) {
            if (e == element) {
                count++;
            }
        }
         
        return count;
    }
    static void Main() {
        var list = new List<int>() { 2, 6, 1, 5, 8, 1, 1, 0, 9, 1 };
        
        int count = CountElement(list, 1);

        Console.WriteLine(count); 
    }
}




/*
run:

4

*/

 

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