Example: 7
7
7^2 = 49
4^2 + 9^2 = 16 + 81 = 97
9^2 + 7^2 = 81 + 49 = 130
1^2 + 3^2 + 0^2 = 1 + 9 + 0 = 10
1^2 + 0^2 = 1 + 0 =
1
7 is a happy number
Example: 8
8
8^2 = 64
6^2 + 4^2 = 36 + 16 = 52
5^2 + 2^2 = 25 + 4 = 29
2^2 + 9^2 = 4 + 81 = 85
8^2 + 5^2 = 64 + 25 = 89
8^2 + 9^2 = 64 + 81 = 145
1^2 + 4^2 + 5^2 = 1 + 16 + 25 = 42
4^2 + 2^2 = 16 + 4 = 20
2^2 + 0^2 = 4 + 0 =
4
4^2 = 16
1^2 + 6^2 = 1 + 36 = 37
3^2 + 7^2 = 9 + 49 = 58
5^2 + 8^2 = 25 + 64 = 89
8 is not a happy number
