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)

Java Programming Language (Article) (Program)

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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 x 4
20 = 4 x 5
42 = 6 x 7

Program:

import java.util.Scanner;

public class RAnsariPronicNumber
{
    public static void main(String args[]) {
        Scanner in = new Scanner(System.in);
        System.out.print("Enter the number to check: ");
        int num = in.nextInt();

        boolean isPronic = false;

        for (int i = 1; i <= num - 1; i++) {
            if (i * (i + 1) == num) {
                isPronic = true;
                break;
            }
        }

        if (isPronic)
            System.out.println(num + " is a pronic number");
        else
            System.out.println(num + " is not a pronic number");
    }
}

Output:

Enter the number to check: 12
12 is a pronic number
 

Enter the number to check: 65
65 is not a pronic number
 
Enter the number to check: 20
20 is a pronic number
 Enter the number to check: 42
42 is a pronic number
 

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