Python: Check whether a number is "happy" or not

Python Basic - 1: Exercise-66 with Solution

From Wikipedia, the free encyclopaedia:
A happy number is defined by the following process:
Starting with any positive integer, replace the number by the sum of the squares of its digits, and repeat the process until the number equals 1 (where it will stay), or it loops endlessly in a cycle which does not include 1. Those numbers for which this process ends in 1 are happy numbers, while those that do not end in 1 are unhappy numbers.
Write a Python program to check whether a number is "happy" or not.

Sample Solution:

Python Code:

def is_Happy_num(n):
  past = set()
  while n != 1:
        n = sum(int(i)**2 for i in str(n))
        if n in past:
            return False
        past.add(n)
  return True
print(is_Happy_num(7))
print(is_Happy_num(932))
print(is_Happy_num(6))

Sample Output:

True
True
False

Pictorial Presentation:

Flowchart:

Python Code Editor:

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