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C# program to find the list of students whose name contains 4 characters using where() method of List collection using Linq

Here, we are going to learn how to find the list of students whose name contains 4 characters using where() method of List collection using Linq?
Submitted by Nidhi, on August 28, 2020

Here we will find the list of students whose name contains 4 characters. Here we will use the where() method. In the where() we will specify the condition to select student names contains 4 characters. To use where() method we need to import "System.Linq" and "System.Collections.Generic" namespaces.

Program:

The source code to find the list of students whose name contains 4 characters, is given below. The given program is compiled and executed successfully on Microsoft Visual Studio.

//Program to find a list of students whose name contains 
//4 characters using Where() method of List collection using Linq.

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

class Demo
{
    static void Main(string[] args)
    {
        List<string> Students = new List<string>();

        Students.Add("Amit");
        Students.Add("Sumit");
        Students.Add("Ayan");
        Students.Add("Shaurya");
        Students.Add("Sanaya");

        IEnumerable<string> result = Students.Where(stu=>stu.Length==4);

        Console.WriteLine("Student Names:");
        foreach (string name in result)
        {
            Console.WriteLine(name);
        }
    }
}

Output:

Student Names:
Amit
Ayan
Press any key to continue . . .

Explanation:

In the above program, we created a list and then add student names to the using Add() method.

IEnumerable<string> result = Students.Where(stu=>stu.Length==4);

In the above code, where() method is used to select student according to a specified condition. Here we find the students whose name contains 4 characters.

Console.WriteLine("Student Names:");
foreach (string name in result)
{
    Console.WriteLine(name);
}

Here we printed the select student name using "foreach" on the console screen.

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