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## number of digits
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### Instructions
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Write a function that returns the number of digits in a nonnegative integer n.
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- if the number is negative input returns 0.
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### Expected function
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```go
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func Numofdigits(num int) int {
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}
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```
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### Usage
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```go
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package main
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import (
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"github.com/01-edu/z01"
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"piscine"
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)
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func main() {
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z01.PrintRune(piscine.Numofdigits(3))
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z01.PrintRune(piscine.Numofdigits(245))
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z01.PrintRune(piscine.Numofdigits(-1))
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z01.PrintRune(piscine.Numofdigits(885))
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z01.PrintRune(piscine.Numofdigits(8574))
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z01.PrintRune('\n')
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}
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```
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And its output :
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```console
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$ go run .
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1
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3
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0
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3
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4
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