Question:
Write a Program in Java to input a number and check whether it is a Pronic Number or Heteromecic Number or not.
Pronic Number : A pronic number, oblong number, rectangular number or heteromecic number, is a number which is the product of two consecutive integers, that is, n (n + 1).
The first few pronic numbers are:
0, 2, 6, 12, 20, 30, 42, 56, 72, 90, 110, 132, 156, 182, 210, 240, 272, 306, 342, 380, 420, 462 … etc.
import java.util.Scanner;
class Pronic
{
public static void main(String args[])
{
Scanner in = new Scanner(System.in);
System.out.println("Enter a number");
int n = in.nextInt();
int flag=0;
for(int i=1; i<n ; i++)
{
if(i*(i+1)==n)
{
flag=1;
break;
}
}
if(flag==1)
System.out.println(n + " is a pronic number");
else
System.out.println(n + " is not a pronic number");
}
}