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] + " ");  
            }
        
        }
    }  
}