﻿ Python: Find and print the first 10 happy numbers - w3resource

# Python: Find and print the first 10 happy numbers

## Python Basic - 1: Exercise-67 with Solution

From Wikipedia,
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 find and print the first 10 happy numbers.

Sample Solution:

Python Code:

``````def happy_numbers(n):
past = set()
while n != 1:
n = sum(int(i)**2 for i in str(n))
if n in past:
return False
return True
print([x for x in range(500) if happy_numbers(x)][:10])
``````

Sample Output:

```[1, 7, 10, 13, 19, 23, 28, 31, 32, 44]
```

Pictorial Presentation: Flowchart: Python Code Editor:

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