evil

Author: aarush2410

evil.java

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+import Java.util.*;   
+import java.io.*;   
+import java.util.Scanner;  
+  
+//create EvilNumberExample class to check whether the given number is an Evil number or not  
+public class EvilNumberExample {  
+  
+    // create checkNumber() method that returns true when it founds number Evil   
+    public static boolean checkNumber(int n) {  
+  
+        // find the equivalence binary number using user defined convertToBinary() method  
+        long binaryNumber = convertToBinary(n);  
+  
+        // find total number of 1's in binary number  
+        int count = 0;  
+  
+        // iterate each digit of binary number  
+        while(binaryNumber != 0) {  
+  
+            // if the last digit of binary number is 1, increase the count value  
+            if(binaryNumber % 10 == 1)   
+                count++;  
+  
+            // remove the last digit from the number  
+            binaryNumber = binaryNumber / 10;  
+        }  
+  
+        // check whether the value of count is even or odd  
+        if(count % 2 == 0)  
+            return true;    //return true when the value of count is even  
+  
+        //return false if the value of the count is false  
+        return false;  
+    }  
+  
+    //create convertToBinary() method to convert the decimal value into binary  
+    private static long convertToBinary(int number) {  
+        long binaryNumber = 0;  
+        int rem = 0;  
+        int j = 1;  
+        while(number != 0) {  
+            rem = number % 2;  
+            binaryNumber += rem * j;  
+            number = number / 2;  
+            j = j * 10;  
+        }  
+          
+        return binaryNumber;    //return the binary equivalent number of the decimal number  
+    }  
+      
+    //main() method start  
+    public static void main(String[] args) {  
+      
+        // declare variable in which the user entered value will be store  
+        int num = 0;  
+  
+        // create scanner class object   
+        Scanner sc =  new Scanner(System.in);  
+          
+        //display custom message  
+        System.out.print("Enter a number : ");  
+          
+        //get input from user  
+        num = sc.nextInt();  
+  
+        // check whether the number is evil number or not  
+        if(checkNumber(num))  
+            System.out.println(num + " is an evil number");  
+        else  
+            System.out.println(num + " is not an evil number");  
+  
+    }  
+}