Linq Sum in C#

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The LINQ (Language-Integrated Query) Sum Method in C# is a powerful tool that allows developers to calculate the sum of values in a sequence. This method is part of the System.Linq namespace and can be used to calculate the sum of any data type that implements the IConvertible interface. In this lesson, we’ll explore the LINQ Sum Method in C# in detail, discussing its syntax, overloads, how it works, and its applications in real-world programming.

Syntax:

The LINQ Sum Method has multiple overloads that take different parameters based on the type of sequence being used. The most common overload is as follows:

public static int Sum<TSource>(this IEnumerable<TSource> source);

This method takes one parameter:

  • The source parameter, which is an IEnumerable<T> type, representing the sequence of values to calculate the sum of.

Overloads:

  • There are overloads for different data types such as float, decimal, double, long, and int.

How it works:

The LINQ Sum Method works by iterating through each element of the sequence and adding the values together. It does this by calling the Add method on each value, and storing the result in a running total.

Let’s take a look at an example to understand how this method works:

int[] numbers = { 5, 2, 8, 1, 9 };
int sum = numbers.Sum();

In this example, we have an array of integers named numbers. We use the Sum method to calculate the sum of values in this array and store the result in the sum variable. The Sum method iterates through each element of the array, adds the value to a running total, and returns the final sum.

Applications:

The LINQ Sum Method is a useful tool that can be used in a variety of real-world programming applications. For example, it can be used to calculate the total price of items in a shopping cart, the total amount of rainfall in a region, or the total number of hours worked by employees in a company. It can also be used in financial applications, such as calculating the total revenue of a company or the total expenses of a project.

Conclusion:

The LINQ Sum Method in C# is a powerful tool that enables developers to calculate the sum of values in a sequence. Its simple syntax and wide range of applications make it a useful tool in a variety of programming scenarios. Whether you’re a beginner or an experienced programmer, understanding the LINQ Sum Method can help you write more efficient and effective code.