Merge pull request codehouseindia#495 from VishwakarmaRishi/patch-2

codehouseindia · web-flow · commit ef5e024be977 · 2020-10-11T13:00:13.000+05:30
Update Armstrong Number.py    using lists
diff --git a/Armstrong Number.py b/Armstrong Number.py
@@ -1,17 +1,39 @@
 num = int(input("Enter a number: "))
 
-# initialize sum
-sum = 0
+# # initialize sum
+# sum = 0
 
-# find the sum of the cube of each digit
-temp = num
-while temp > 0:
-   digit = temp % 10
-   sum += digit ** 3
-   temp //= 10
+# # find the sum of the cube of each digit
+# temp = num
+# while temp > 0:
+#    digit = temp % 10
+#    sum += digit ** 3
+#    temp //= 10
 
-# display the result
-if num == sum:
-   print(num,"is an Armstrong number")
+# # display the result
+# if num == sum:
+#    print(num,"is an Armstrong number")
+# else:
+#    print(num,"is not an Armstrong number")
+
+
+# one-liner armstrong check
+is_armstrong = lambda num: sum([int(i)**3 for i in str(num)]) == num
+
+# some detailed code
+def isArmstrong(num):
+    digits = tuple(str(num))               # create a tuple of digits
+    digit_cube = []                        # create a list to store cube of digits
+    for digit in digits:                   # loop over every digit
+        digit_cube.append(int(digit)**3)   # add the cube of each digit to the cube list
+    sum_of_cubes = sum(digit_cube)         # calculate the sum of cubes
+    if sum_of_cubes == num:                # check if sum is equal to the original number
+        return True                         
+    else:                                  
+        return False                       
+
+# driver code
+if is_armstrong(num) and isArmstrong(num):
+    print(num, "is an Armstrong number")
 else:
-   print(num,"is not an Armstrong number")
+    print(num, "is not an Armstrong number")
