Question

How to check whether a given number is a pronic number in Java

Answer 1

// A pronic number is a number which is the product of two consecutive integers
// 42 = 6 * 7 -> yes 6 and 7 is consecutive integers
// 45 = 5 * 9 -> no 5 and 9 is not consecutive integers

public class MyClass {
    static boolean isPronicNumber(int num) {  
        for (int i = 1; i <= num; i++) {  
            if ((i * (i + 1)) == num) {  
                return true;
            }  
        }  
        return false;  
    } 
    public static void main(String args[]) {
        int num = 42;
      
        if (isPronicNumber(num))  
            System.out.println("yes");  
        else
            System.out.println("no");  
    }
}



/*
run:
  
yes
  
*/

 

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