Question

Print pronic number in an array.

(The pronic number can be defined as the number which is a product of two consecutive numbers. )

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Code

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

        int n=0,i=0,j=0;
        boolean flag=false;
        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();
        }

       /* printing pronic elements in an array */
        System.out.println("pronic Elements in an array :");
        for(i=0;i< n;i++)
        {
            flag=false;
            for(j=0;j<=arr[i];j++)
            {
                if((j*(j+1))==arr[i])
                {
                    flag=true;
                    break;
                }
            }
            if(flag==true)
            {
                System.out.print(arr[i] + " ");
            }

        }
    }
}