Max

In this chapter you will learn:

How to use Max operator
Max with filter delegate
Max among string array
Max for custom types
How to get the longest word

Get to know Max operator

Max returns the smallest or largest element from a sequence:

using System;//from j a v  a2 s . c o m
using System.Collections;
using System.Collections.Generic;
using System.Linq;

class Program
{
    static void Main()
    {
        int[] numbers = { 28, 32, 14 };
        int largest = numbers.Max();  // 32;
        Console.WriteLine(largest);

    }
}

The output:

Max with filter delegate

If you include a selector expression:

using System;/*j av  a  2  s.  c  o  m*/
using System.Collections;
using System.Collections.Generic;
using System.Linq;

class Program
{
    static void Main()
    {
        int[] numbers = { 28, 32, 14 };
        int smallest = numbers.Max(n => n % 10);  // 8;
        Console.WriteLine(smallest);

    }
}

The output:

Max among string array

using System;/*from   j a v a 2  s  .  c  o  m*/
using System.Linq;
using System.Collections;
using System.Collections.Generic;

public class MainClass {
    public static void Main() {
        string[] presidents = {"G", "H", "H", "java2s.com", "H", "J"};
        string maxName = presidents.Max();
        Console.WriteLine(maxName);
    }
}

Max for custom types

using System;//ja  v  a  2 s  .  c  om
using System.Linq;
using System.Collections;
using System.Collections.Generic;
public class Employee {
    public int birthYear;
    public string firstName;
    public string lastName;

    public static Employee[] GetEmployees() {
        Employee[] actors = new Employee[] {
        new Employee { birthYear = 1964, firstName = "K", lastName = "R" },
        new Employee { birthYear = 1968, firstName = "O", lastName = "W" },
        new Employee { birthYear = 1960, firstName = "J", lastName = "S" },
        new Employee { birthYear = 1964, firstName = "S", lastName = "B" },
      };
        return (actors);
    }
}
public class MainClass {
    public static void Main() {
        int youngestEmployeeAge = Employee.GetEmployees().Max(a => a.birthYear);
        Console.WriteLine(youngestEmployeeAge);
    }
}

Max word length

The following code uses Max to get the length of the longest word in a string array.

using System;/*ja  va2  s .  c o  m*/
using System.Collections.Generic;
using System.Linq;
using System.Text;

public class MainClass {
    public static void Main() {
        string[] words = { "cherry", "apple", "blueberry" };

        int longestLength = words.Max(w => w.Length);

        Console.WriteLine("The longest word is {0} characters long.", longestLength);
    }
}

Next chapter...

What you will learn in the next chapter: