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## checknumber
### Instructions
Write a function that takes a `string` as an argument and returns `true` if the string contains any number, otherwise return `false`.
### Expected function
```go
func CheckNumber(arg string) bool {
}
```
### Usage
Here is a possible program to test your function:
```go
package main
import (
"fmt"
"piscine"
)
func main() {
fmt.Println(piscine.CheckNumber("Hello"))
fmt.Println(piscine.CheckNumber("Hello1"))
}
```
And its output:
```console
$ go run .
false
true
$
```