Merge pull request #642 from subahanii/patch-1

update happy_num

Author: geekcomputers

happy_num

@@ -1,3 +1,5 @@
+#Way2 1:
+
 #isHappyNumber() will determine whether a number is happy or not    
 def isHappyNumber(num):    
     rem = sum = 0;    
@@ -17,7 +19,27 @@ while(result != 1 and result != 4):
 
 #Happy number always ends with 1    
 if(result == 1):    
-    print(str(num) + " is a happy number");    
+    print(str(num) + " is a happy number after apply way 1");    
 #Unhappy number ends in a cycle of repeating numbers which contain 4    
 elif(result == 4):    
-    print(str(num) + " is not a happy number");  
+    print(str(num) + " is not a happy number after apply way 1");  
+
+
+
+
+
+#way 2:
+
+#Another way to do this and code is also less
+n=num
+setData=set()		#set datastructure for checking a number is repeated or not.
+while 1:
+	if n==1:
+		print("{} is a happy number after apply way 2".format(num))
+		break
+	if n in setData:
+		print("{} is Not a happy number after apply way 2".format(num))
+		break
+	else:
+		setData.add(n)	#adding into set if not inside set
+		n=int(''.join(str(sum([int(i)**2 for i in str(n)]))))       #Pythonic way