Programming Examples

Java program to input a number and check and print whether it is a Pronic number or not


Write a program to input a number and check and print whether it is a Pronic 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.

Solution

import java.util.*;
class PronicNumber
{
	public static void main(string arr[])
	{
		Scanner sc=new Scanner(System.in);
		int n,i,f=0;
		System.out.println(“Enter a number:”);
		n=sc.nextInt();
		for(i=1;i*(i+1)<=n;i++)
		{
			if(i*(i+1)==n)
			{
				System.out.println(“Pronic Number”);
				f=1;
			}
		}
		if(f==0)
			System.out.println(“Not a pronic number”);
	}
}
Output

Enter a number : 110

110 is a Pronic Number.

Enter a number : 73

73 is not a Pronic Number.

Enter a number : 342

342 is a Pronic Number.

Enter a number : 15

15 is not a Pronic Number.

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