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C# Program to Show the Usage of LINQ Aggregate() Method
The Aggregate() method is a powerful LINQ method that allows you to perform a reduction operation on a sequence of elements. This method can be used to perform calculations on a collection of data, such as finding the sum, product, or maximum value of a set of numbers. In this article, we will explore how to use the Aggregate() method in a C# program.
What is the Aggregate() Method?
The Aggregate() method is a LINQ extension method that takes two parameters: a seed value and a function that performs a reduction operation on a sequence of elements. The seed value is the initial value of the operation, and the function specifies how to combine each element of the sequence with the previous result.
Syntax of Aggregate() Method
public static TAccumulate Aggregate<TSource, TAccumulate>(this IEnumerable<TSource> source, TAccumulate seed, Func<TAccumulate, TSource, TAccumulate> func)
Example: Using Aggregate() Method to find the Sum of a Sequence of Numbers
Let's see an example of how to use the Aggregate() method to find the sum of a sequence of numbers.
using System.IO;
using System;
using System.Linq;
class Program {
static void Main(string[] args) {
int[] numbers = { 1, 2, 3, 4, 5 };
int sum = numbers.Aggregate((x, y) => x + y);
Console.WriteLine("The sum of the sequence is: {0}", sum);
}
}
In this code, we have an array of integers named numbers. We use the Aggregate() method to calculate the sum of the sequence by passing a lambda expression that adds the two elements together.
Output
The sum of the sequence is: 15
Example: Using Aggregate() Method to find the Product of a Sequence of Numbers
Now, let's see an example of how to use the Aggregate() method to find the product of a sequence of numbers.
using System;
using System.Linq;
class Program {
static void Main() {
int[] numbers = { 1, 2, 3, 4, 5 };
int product = numbers.Aggregate(1, (x, y) => x * y);
Console.WriteLine("The product of the sequence is: {0}", product);
}
}
In this code, we have an array of integers named numbers. We use the Aggregate() method to calculate the product of the sequence by passing an initial value of 1 and a lambda expression that multiplies the two elements together.
Output
The product of the sequence is: 120
Conclusion
The Aggregate() method is a powerful LINQ method that can be used to perform a reduction operation on a sequence of elements. In this article, we explored how to use the Aggregate() method in a C# program to find the sum and product of a sequence of numbers.
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