# 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
past.add(n)
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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**Previous:** Write a Write a Python program to check whether a number is "happy" or not.

**Next:** Write a Python program to count the number of prime numbers less than a given non-negative number.

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