How to Reduce Values in a Dictionary to a Single Value in C#

How to Reduce Values in a Dictionary to a Single Value in C# ?

Answer

To reduce values in a dictionary to a single value in C#, you can use the `Aggregate` method from the `System.Linq` namespace. This allows you to apply a function to each value in the dictionary and combine them into a single value.

✐ Examples

1 Reducing Values in a Dictionary to Their Sum Using `Aggregate`

We can reduce the values in a dictionary to their sum in C# using the `Aggregate` method from the `System.Linq` namespace. This example demonstrates how to declare and initialize a dictionary, use the `Aggregate` method to sum the values, and print the result.

For example,

We start by including the necessary namespaces: using System.Collections.Generic; and using System.Linq;.
We declare and initialize a dictionary named myDictionary with integer keys and integer values.
We use the `Aggregate` method to sum the values in the dictionary.
We print the result.

C# Program

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

class Program
{
    static void Main()
    {
        // Declare and initialize a dictionary
        Dictionary<int, int> myDictionary = new Dictionary<int, int>
        {
            {1, 10},
            {2, 20},
            {3, 30}
        };

        // Use Aggregate to sum the values in the dictionary
        int sum = myDictionary.Values.Aggregate((acc, value) => acc + value);

        // Print the result
        Console.WriteLine("Sum of values: " + sum);
    }
}

Output

Sum of values: 60

2 Reducing Values in a Dictionary to Their Product Using `Aggregate`

We can reduce the values in a dictionary to their product in C# using the `Aggregate` method from the `System.Linq` namespace. This example demonstrates how to declare and initialize a dictionary, use the `Aggregate` method to multiply the values, and print the result.

For example,

We start by including the necessary namespaces: using System.Collections.Generic; and using System.Linq;.
We declare and initialize a dictionary named myDictionary with integer keys and integer values.
We use the `Aggregate` method to multiply the values in the dictionary.
We print the result.

C# Program

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

class Program
{
    static void Main()
    {
        // Declare and initialize a dictionary
        Dictionary<int, int> myDictionary = new Dictionary<int, int>
        {
            {1, 10},
            {2, 20},
            {3, 30}
        };

        // Use Aggregate to multiply the values in the dictionary
        int product = myDictionary.Values.Aggregate((acc, value) => acc * value);

        // Print the result
        Console.WriteLine("Product of values: " + product);
    }
}

Output

Product of values: 6000

Summary

In this tutorial, we learned How to Reduce Values in a Dictionary to a Single Value in C# language with well detailed examples.

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