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.
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))
True True False
Python Code Editor:
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