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Home Forums How to find the third largest number in an array using a loop? – MindStick
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3 Answers

Aryan Kumar
Aryan Kumar 15 Jun 2023
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Here is a Java program to find the third largest number in an array using a loop:

Code snippet

import java.util.*;

public class ThirdLargestInArray {

    public static void main(String[] args) {

        // Create an array
        int[] arr = {12, 13, 1, 10, 34, 11};

        // Initialize the three largest elements as minus infinite
        int first = Integer.MIN_VALUE;
        int second = Integer.MIN_VALUE;
        int third = Integer.MIN_VALUE;

        // Iterate through the array
        for (int i = 0; i < arr.length; i++) {

            // If the current element is greater than the first largest element
            if (arr[i] > first) {

                // Update the third largest element
                third = second;

                // Update the second largest element
                second = first;

                // Update the first largest element
                first = arr[i];
            } else if (arr[i] > second && arr[i] != first) {

                // Update the third largest element
                third = second;

                // Update the second largest element
                second = arr[i];
            } else if (arr[i] > third && arr[i] != second) {

                // Update the third largest element
                third = arr[i];
            }
        }

        // Print the third largest element
        System.out.println("The third largest element is " + third);
    }
}

This program will print the following output:

Code snippet

The third largest element is 11
Rahul Roi
Rahul Roi 02 Feb 2023
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// Online C# Editor for free
// Write, Edit and Run your C# code using C# Online Compiler

using System;

public class HelloWorld
{
    public static void Main(string[] args)
    {
        int[] num={2,1,3,7,6,8,4,9};
        Console.WriteLine (FindLargetValue(num));
        //Console.WriteLine (FindLargetValue(num, -2));
        Console.WriteLine (FindLargetValue(num, 3));
        Console.WriteLine (FindLargetValue(num, 1));
    }
    
    public static int FindLargetValue(int[] array , int position=0)
    {
        Array.Sort(array);
        Array.Reverse(array);
        if(position<0 || position> array.Length)
        {
            throw new Exception('Index not found');
        }
        return position==0 ? array[position] :  array[position-1];
    }
}

If we put index in negative value then throw an exception “Index Not Found”, like -1, -0, -2 

If you put position value higher than length of array then throw an exception “Index Not Found” .

Output is →

9

7
8
 

Tehran Noorani
Tehran Noorani 01 Feb 2023
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This is the simple C# program to find the third largest number from a given integer array.

using System;
namespace Test
{
 class ThirdLargeNumber
 {
   static void Main(string[] args)
   {
   int[] num={2,1,3,7,6,8,4,9};
    LargestThirdNumber(num);
   }
     internal static void LargestThirdNumber(int[] arr)    
     {    
         int num1 = int.MinValue;    
         int num2 = int.MinValue;    
         int num3 = int.MinValue;    
         foreach (int i in arr)    
         {    
             if (i > num1)    
             {    
                 num3 = num2;    
                 num2 = num1;    
                 num1 = i;    
             }    
             else if (i > num2 && i != num1)    
             {    
                 num3 = num2;    
                 num2 = i;    
             }    
             else if (i > num3 && i != num2 && i != num1)    
             {    
                 num3 = i;    
             }    
         }    
         Console.WriteLine(num3); ;    
     }
 }
}

Output: 7
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