Network disconnected

###### Description

Given a natural number `N`

as the parameter, write a function `solution`

to return the sum of each digit of `N`

.

For example, if N = 123, return 1 + 2 + 3 = 6.

##### Constraints

- Range of
`N`

: natural number less than or equal to 100,000,000.

##### Examples

N | answer |
---|---|

123 | 6 |

987 | 24 |

Example #1

Same as the example in the problem statement.

Example #2

Since 9 + 8 + 7 = 24, return 24.

Result
Stop

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