Merge pull request codehouseindia#157 from aditya-gite-04/master

codehouseindia · web-flow · commit dba686896b05 · 2020-10-15T00:53:09.000+05:30
Happy Number
diff --git a/AbundantNumber.java b/AbundantNumber.java
@@ -0,0 +1,56 @@
+import java.io.*;  
+import java.math.*; 
+  
+// Function to calculate sum of divisors 
+class AbundantNumber{ 
+    static int getSum(int n) 
+    { 
+        int sum = 0; 
+    
+       // Note that this loop runs till square  
+       // root of n 
+        for (int i=1; i<=(Math.sqrt(n)); i++) 
+        { 
+            if (n%i==0) 
+            { 
+             // If divisors are equal,take only  
+             // one of them 
+                if (n/i == i) 
+                   sum = sum + i; 
+    
+                else // Otherwise take both 
+                { 
+                   sum = sum + i; 
+                   sum = sum + (n / i); 
+                } 
+            } 
+        } 
+    
+        // calculate sum of all proper divisors  
+       // only 
+        sum = sum - n; 
+        return sum; 
+    } 
+    
+    // Function to check Abundant Number 
+    static boolean checkAbundant(int n) 
+    { 
+      // Return true if sum of divisors is  
+      // greater than n. 
+      return (getSum(n) > n); 
+    } 
+    
+    /* Driver program to test above function */
+    public static void main(String args[])throws 
+                                   IOException 
+    { 
+      if(checkAbundant(12)) 
+          System.out.println("YES"); 
+      else
+          System.out.println("NO"); 
+      if(checkAbundant(15)) 
+          System.out.println("YES"); 
+      else
+          System.out.println("NO"); 
+    } 
+} 
diff --git a/EvilNumber.java b/EvilNumber.java
diff --git a/HappyNumber.java b/HappyNumber.java
@@ -0,0 +1,27 @@
+public class HappyNumber  
+{     
+    public static int isHappyNumber(int num){  
+        int rem = 0, sum = 0;  
+          
+        while(num > 0){  
+            rem = num%10;  
+            sum = sum + (rem*rem);  
+            num = num/10;  
+        }  
+        return sum;  
+    }  
+      
+    public static void main(String[] args) {  
+        int num = 82;  
+        int result = num;  
+          
+        while(result != 1 && result != 4){  
+            result = isHappyNumber(result);  
+        }  
+          
+        if(result == 1)  
+            System.out.println(num + " is a happy number");  
+        else if(result == 4)  
+            System.out.println(num + " is not a happy number");     
+    }  
+}  
