Question

Wap to enter a number and check if it is a evil number or not

Using java and function parameter

Please give the definition of evil number


Urgent​

Answer 1

Definition of Evil Number:

• A number is said to be an evil number only if it's binary expansion is containing "even" number of 1's in it.

Program:

import java.util.Scanner;

import java.lang.Integer.*;

public class Main{

     public static void main(String[] args) {

           System.out.println("Enter a number to check weather it is evil number or not");

           Scanner scan = new Scanner(System.in);

           int number = scan.nextInt();

           String binary = Integer.toBinaryString(number);

           int evil=0;

           for(int i = 0 ; i < binary.length() ; i++){

                if(binary. charAt(i) == '1'){

                       evil = evil + 1;

                 }

           }

           if(evil % 2 == 0 && evil > 0){

                 System.out.println("Number"+number+" is an evil number");

           }else{

                 System.out.println("Number "+number+" is not an evil number");

           }

     }

}

Output-1:

Enter a number to check weather it is evil number or not : 23

Number 23 is an evil number

Output-1:

Enter a number to check weather it is evil number or not : 19

Number 19 is not an evil number

Explanation:

• In java there is predefined method called toBinaryString() where it takes the given integer and returns the binary expansion of that integer
• so i used it to first convert the given number into binary format and stored it as a string variable "binary".
• and then using for loop i took each character from the number using predefined method charAt() which takes index of the character you want in the given string as an argument and returns that character so i used it to get the every character from that string and checked if it is 1 or not
• if true then i increased the value of variable "evil" to 1
• it not the loop iterates until end of the string length condition gets false
• at last i will get the value of number of 1's in the number and i will check if it is even or not
• if true then it is a evil number
• if not then it is not a evil number.

-- hop you liked my program and my definition of evil number and my explanation, if you liked it mark as brainliest.