How to find the Element with Minimum Number of Occurrences in a List in C# - Step by Step Examples



How to find the Element with Minimum Number of Occurrences in a List in C# ?

Answer

To find the element with the minimum number of occurrences in a list in C#, you can use a Dictionary to count the occurrences.



✐ Examples

1 Find Least Frequent Integer in List

In this example,

  1. We import the necessary namespaces.
  2. We create a list named data with several integer elements.
  3. We declare a Dictionary to count the occurrences of each element.
  4. We iterate through the list to populate the dictionary with counts.
  5. We find the element with the minimum count by iterating through the dictionary.
  6. Finally, we print the least common element to the console.

C# Program

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

class Program {
    static void Main() {
        List<int> data = new List<int> {1, 2, 2, 3, 3, 3, 4};
        Dictionary<int, int> count = new Dictionary<int, int>();
        foreach (int num in data) {
            if (count.ContainsKey(num)) {
                count[num]++;
            } else {
                count[num] = 1;
            }
        }
        int leastCommon = data[0];
        int minCount = count.Values.Min();
        foreach (var pair in count) {
            if (pair.Value == minCount) {
                leastCommon = pair.Key;
                break;
            }
        }
        Console.WriteLine("Element with the minimum occurrences is: " + leastCommon);
    }
}

Output

Element with the minimum occurrences is: 1

2 Find Least Frequent String in List

In this example,

  1. We import the necessary namespaces.
  2. We create a list named words with several string elements.
  3. We declare a Dictionary to count the occurrences of each element.
  4. We iterate through the list to populate the dictionary with counts.
  5. We find the element with the minimum count by iterating through the dictionary.
  6. Finally, we print the least common element to the console.

C# Program

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

class Program {
    static void Main() {
        List<string> words = new List<string> {"apple", "banana", "apple", "orange", "banana", "apple"};
        Dictionary<string, int> count = new Dictionary<string, int>();
        foreach (string word in words) {
            if (count.ContainsKey(word)) {
                count[word]++;
            } else {
                count[word] = 1;
            }
        }
        string leastCommon = words[0];
        int minCount = count.Values.Min();
        foreach (var pair in count) {
            if (pair.Value == minCount) {
                leastCommon = pair.Key;
                break;
            }
        }
        Console.WriteLine("Element with the minimum occurrences is: " + leastCommon);
    }
}

Output

Element with the minimum occurrences is: orange

Summary

In this tutorial, we learned How to find the Element with Minimum Number of Occurrences in a List in C# language with well detailed examples.




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