LINQ | How to find average of the given sequence?

In LINQ, you can find the average of the given sequence by using the Average method. This method returns the average of the elements present in the given sequence or collection. It returns nullable, non-nullable decimal, double, floats, int, etc. values. It does not support query syntax in C#, but it supports in VB.NET. It is available in both Enumerable and Queryable classes in C#.

Example 1:

// C# program to find the average
// the given array
using System;
using System.Linq;

class GFG {

    static public void Main()
    {

        // Data source
        int[] sequence = { 20, 45, 50, 79, 90, 79, 89, 100, 567, 29 };

        // Display the sequence
        Console.WriteLine("The sequence is:");
        foreach(int s in sequence)
        {
            Console.WriteLine(s);
        }

        // Finding the average of the element
        // present in the given array
        // Using Average function
        double result = sequence.Average();
        Console.WriteLine("Average is: {0}", result);
    }
}

Output:

The sequence is:
20
45
50
79
90
79
89
100
567
29
Average is: 114.8

Example 2:

// C# program to find the average
// salary of the employee
using System;
using System.Linq;
using System.Collections.Generic;

// Employee details
class Employee {

    public int emp_id
    {
        get;
        set;
    }
    public string emp_name
    {
        get;
        set;
    }
    public string emp_gender
    {
        get;
        set;
    }
    public string emp_hire_date
    {
        get;
        set;
    }
    public int emp_salary
    {
        get;
        set;
    }
}

public class GFG {

    // Main method
    static public void Main()
    {
        List<Employee> emp = new List<Employee>() {
            new Employee() { emp_id = 209, emp_name = "Anjita", emp_gender = "Female", emp_hire_date = "12/3/2017", emp_salary = 20000 },
                new Employee() { emp_id = 210, emp_name = "Soniya", emp_gender = "Female", emp_hire_date = "22/4/2018", emp_salary = 30000 },
                new Employee() { emp_id = 211, emp_name = "Rohit", emp_gender = "Male", emp_hire_date = "3/5/2016", emp_salary = 40000 },
                new Employee() { emp_id = 212, emp_name = "Supriya", emp_gender = "Female", emp_hire_date = "4/8/2017", emp_salary = 40000 },
                new Employee() { emp_id = 213, emp_name = "Anil", emp_gender = "Male", emp_hire_date = "12/1/2016", emp_salary = 40000 },
                new Employee() { emp_id = 214, emp_name = "Anju", emp_gender = "Female", emp_hire_date = "17/6/2015", emp_salary = 50000 },
        };

        // Find the average salary of the employee
        // Using Average () method
        var res = emp.Average(a => a.emp_salary);
        Console.WriteLine("Average salary of the Employees: {0}", res);
    }
}

Output:

Average salary of the Employees: 36666.6666666667