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Question

Print duplicate elements of an array.

Input:
ENTER THE SIZE OF ARRAY:10
ENTER THE ELEMENT IN THE ARRAY:
1 2 3 4 5 6 7 8 9 10

ARRAY AFTER DELETING EVEN POSITION ELEMENTS:
2 4 6 8 10

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Code

import java.util.Scanner;
public class duplicateNumbersInArray
{
    public static void main(String[] args)
    {
        /* Initialize array */
        int [] arr;

        int n=0,i=0,j=0,count=0;
        Scanner sc = new Scanner(System.in);

        System.out.println("Enter a number of elements in the array");
        n = sc.nextInt();
        arr=new int[n];
        System.out.println("Enter numbers in array");

        for(i=0;i< n;i++)
        {
            arr[i]=sc.nextInt();
        }

        System.out.println("Duplicate numbers in array are:");

        /*finding the frequency of elements the array and printing the number and frequency of it */
        for ( i = 0; i < n; i++)
        {
            count=0;
            if(arr[i]!=-9999999)
            {
                for(j=0;j< n;j++)
                {

                    if(arr[j]==arr[i])
                    {
                        /* replacing the duplicate element so that it is not repeated again */
                        arr[j]=-9999999;
                        count++;

                    }
                }
                if(count>1)
                {
                    System.out.println(i+"  ");
                }
            }

        }
    }
}

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