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Pronic number program in Java
WAP in Java to input a number and check whether it is a Pronic Number or Heteromecic Number or not
A pronic number is a number which is the product of two consecutive integers, that is, a number of the form n(n + 1). The pronic number is also called oblong numbers, heteromecic numbers, or rectangular numbers.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
Example:
30 = 5 * (5+1)
42 = 6 * (6+1)
56 = 7 * (7+1)
import java.util.Scanner;
public class PronicNumber {
public static boolean isPronic(int number) {
int i = 0; // iterator variable
// loop until square root of the number
while(i <= (int)Math.sqrt(number)) {
if(number == i*(i+1))
return true;
// increase iterator variable by 1
i++;
}
return false;
}
public static void main(String[] args) {
// declare variables
int number = 0;
// read the input
Scanner scan = new Scanner(System.in);
System.out.print("Enter an integer number:: ");
number = scan.nextInt();
// check the number is Pronic number or not
if(isPronic(number))
System.out.println(number+" is a"
+ " pronic number");
else
System.out.println(number+" is not a"
+ " pronic number");
// close Scanner class object
scan.close();
}
}
output:
Enter an integer number:: 30
30 is a pronic number
Enter an integer number:: 15
15 is not a pronic number