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Solved 2018 ICSE Computer Science Paper

Class 10 - ICSE Computer Science Solved Papers

Pronic Number - ICSE 2018 Computer Science

 
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

Java 

import java.util.Scanner;
class Pronic{
    public static void main(String[] args){
        Scanner in = new Scanner(System.in);
        System.out.print("N = ");
        int n = Integer.parseInt(in.nextLine());
        int p = 1;
        while(p * (p + 1) < n)
            p++;
        if(p * (p + 1) == n)
            System.out.println("Pronic number");
        else
            System.out.println("Not a Pronic number");
    }
}

Output

 
 OUTPUT 1: 
 N = 12
Pronic number

 OUTPUT 2: 
 N = 20
Pronic number
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