Question

Write a program to input a number and check and print whether it is a Pronic number or not. (Pronic number is the number which is the product of two consecutive integers).

Examples: 12 = 3 × 4 
20 = 4 × 5
42 = 6 × 7

Answer 1

import java.io.*;
import java.util. Scanner;
class Pronic]
public static void main(String argsQ) throws IOException {
Scanner sc = new Scanner(System.in);
System.out.print(“Enter the number: “);
int n = sc.nextlnt();
int i = 0;
while(i * (i + 1) < n) {
i++;
}
if(i *(i + 1) = = n){
System.out.println(n + ” is a Pronic Number.”);
}
else {
System.out.prindn(n + ” is not a Pronic Number.”);
}
}
}

Answer 2

import java.util.*;
public class Q6
{public static void main(String args[])
{ int flag = 0;
Scanner ob = new Scanner(System.in);
System.out.println("Enter the number");
int n = ob.nextInt();
for (int i = 1; i <= n / 2; i++)
{ if (n == i * (i + 1))
{ flag = 1;
break;
}}
if (flag == 1)
System.out.println("It is a pronic number");
else
System.out.println("It is not a pronic number");
}}