Question

Write a program to input a number and check and print whether it is a Pronic number or not. The pronic number is the number which is the product of two consecutive integers.
Examples:
12 = 3 × 4
20 = 4 × 5
42 = 6 × 7

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Code

				
					import java.util.Scanner;
public class PronicNumbers 
{  
    public static void main(String[] args) 
    {  
        int num=0, i=0;  
        boolean flag=false;
        Scanner sc = new Scanner(System.in);
        System.out.println("Enter a number");
        num=sc.nextInt();
        for(i=0;i<=num;i++)
        {
            if((i*(i+1))==num)
            {
                flag=true;
                break;
            }
        }
        if(flag==true)
        {
            System.out.print(num + " is a pronic number ");  
        }
        else
        {
            System.out.print(num + " is not a pronic number ");
        }
          
    }  
}