Average method in Linq

Hi friends, In this tutorial, we will see the Average method in Linq. An average is an extension method in System.Linq namespace to compute the average of the numeric values in a collection.

An average method in Linq:

Average function is used to compute the average of numeric values in a collection.

Example1: Calculate the average of numbers in a collection.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;



class Program
{


static void Main(string[] args)
{
int[] iNumbers = { 1, 2, 3, 4, 5, 6, 7, 8, 9 };

double Average = iNumbers.Average();
Console.WriteLine("Average is {0}", Average);
Console.ReadLine();


}
}

Output:

Average is 5

Example 2: Calculate the average salary using the Method syntax:

This example will calculate the average salary of the employee.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

public class Employee
{
public string EmployeeCode { get; set; }
public string EmployeeName { get; set; }
public string Gender { get; set; }
public string Designation { get; set; }
public double Salary { get; set; }
}
class Program
{
 
public static List<Employee> DataSource()
{
List<Employee> lstEmployee = new List<Employee>();
Employee objEmployee1 = new Employee() { EmployeeCode = "E001", EmployeeName = "Ayush Singh", Gender = "Male", Designation = "Software Engineer", Salary = 30000 };
Employee objEmployee2 = new Employee() { EmployeeCode = "E002", EmployeeName = "Ritwik Nigam", Gender = "Male", Designation = "Software Engineer", Salary = 30000 };
Employee objEmployee3 = new Employee() { EmployeeCode = "E003", EmployeeName = "Nikhil Bakshi", Gender = "Male", Designation = "Team Lead", Salary = 60000 };
Employee objEmployee4 = new Employee() { EmployeeCode = "E004", EmployeeName = "Nidhi Verma", Gender = "Female", Designation = "HR", Salary = 40000 };
Employee objEmployee5 = new Employee() { EmployeeCode = "E005", EmployeeName = "Ayushman Lakhotia", Gender = "Male", Designation = "Project Manager", Salary = 80000 };
Employee objEmployee6 = new Employee() { EmployeeCode = "E006", EmployeeName = "Neha Sharma", Gender = "Female", Designation = "Graphic Designer", Salary = 25000 };
lstEmployee.Add(objEmployee1);
lstEmployee.Add(objEmployee2);
lstEmployee.Add(objEmployee3);
lstEmployee.Add(objEmployee4);
lstEmployee.Add(objEmployee5);
lstEmployee.Add(objEmployee6);
return lstEmployee;
}

static void Main(string[] args)
{
double dAverageSalary = DataSource().Average(e => e.Salary);
Console.WriteLine("Sum of Salary {0}",Math.Round(dAverageSalary,2));
Console.ReadLine();


}
}

Output:

Sum of Salary 44166.67

Example 3: Calculate the average salary using Query Syntax.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;


public class Employee
{
public string EmployeeCode { get; set; }
public string EmployeeName { get; set; }
public string Gender { get; set; }
public string Designation { get; set; }
public double Salary { get; set; }
}
class Program
{
 
public static List<Employee> DataSource()
{
List<Employee> lstEmployee = new List<Employee>();
Employee objEmployee1 = new Employee() { EmployeeCode = "E001", EmployeeName = "Ayush Singh", Gender = "Male", Designation = "Software Engineer", Salary = 30000 };
Employee objEmployee2 = new Employee() { EmployeeCode = "E002", EmployeeName = "Ritwik Nigam", Gender = "Male", Designation = "Software Engineer", Salary = 30000 };
Employee objEmployee3 = new Employee() { EmployeeCode = "E003", EmployeeName = "Nikhil Bakshi", Gender = "Male", Designation = "Team Lead", Salary = 60000 };
Employee objEmployee4 = new Employee() { EmployeeCode = "E004", EmployeeName = "Nidhi Verma", Gender = "Female", Designation = "HR", Salary = 40000 };
Employee objEmployee5 = new Employee() { EmployeeCode = "E005", EmployeeName = "Ayushman Lakhotia", Gender = "Male", Designation = "Project Manager", Salary = 80000 };
Employee objEmployee6 = new Employee() { EmployeeCode = "E006", EmployeeName = "Neha Sharma", Gender = "Female", Designation = "Graphic Designer", Salary = 25000 };
lstEmployee.Add(objEmployee1);
lstEmployee.Add(objEmployee2);
lstEmployee.Add(objEmployee3);
lstEmployee.Add(objEmployee4);
lstEmployee.Add(objEmployee5);
lstEmployee.Add(objEmployee6);
return lstEmployee;
}

static void Main(string[] args)
{
double dAverageSalary = (from e in DataSource() select e.Salary).Average();
Console.WriteLine("Sum of Salary {0}",Math.Round(dAverageSalary,2));
Console.ReadLine();



}
}

View More:

• Count operator in Linq.
• Any Operator in Linq.
• SelectMany: LINQ projection operator.
• Where Clause Filtering Operator in Linq

Conclusion:

I hope you would love this post. Please feel free to comment for any questions. Your feedback and suggestions are welcome.

Thank You.