C# bool List Count True

Introduction

In C#, a bool list represents a collection of Boolean values. The List<bool> class is used to create and manipulate such lists. One common operation is to count the number of true values in the list. This tutorial will guide you through the process of counting true values in a List<bool> object using C#.

Steps to Count True in a List<bool>

1. Create a new instance of List<bool> and initialize it with desired Boolean values:

List<bool> boolList = new List<bool> { true, false, true, false, true };

2. Use the Count() method with a lambda expression to count the number of true values in the list:

int trueCount = boolList.Count(b => b == true);

3. The trueCount variable now contains the count of true values in the boolList.

Example

Here's a complete example that demonstrates counting true values in a bool list:

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

public class Program
{
    public static void Main(string[] args)
    {
        List<bool> boolList = new List<bool> { true, false, true, false, true };
        int trueCount = boolList.Count(b => b == true);
    
        Console.WriteLine($"Number of true values: {trueCount}");
    }
}

Output:

Number of true values: 3

In this example, a bool list boolList is created with 5 Boolean values. The Count() method is used to count the number of true values, and the result is printed to the console.

This approach can be used with any List<bool> object to count the occurrences of true in the list.

Conclusion

Counting the number of true values in a List<bool> using C# is straightforward. By using the Count() method with a lambda expression, you can easily determine the count of true occurrences.