Pronic Number is a number which is product of two consecutive numbers.
Example 1: 20. 4 x 5 = 20. We observe 4 and 5 are consecutive whose product is 20. hence it is a Pronic Number.
Example 2: 9 is not an product of two consecutive numbers. Hence it is not an Pronic Number.
Java
import java.util.*;
public class PronicNumber
{
public static void main(String args[])
{
int n=0,flag=0;
Scanner sc=new Scanner(System.in);
System.out.print("Enter a number: ");
n=sc.nextInt();
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");
}
}
}