public/subjects/fromto

fromto

Instructions

Write a function that takes two integers and returns a string showing the range of numbers from the first to the second.

• The numbers must be separated by a comma and a space.
• If any of the arguments is bigger than 99 or less than 0, the function returns Invalid followed by a newline \n.
• Prepend a 0 to any number that is less than 10.
• Add a new line \n at the end of the string.

Expected function

func FromTo(from int, to int) string {

}

Usage

Here is a possible program to test your function:

package main

import (
	"fmt"
	"psicine"
)

func main() {
	fmt.Print(piscine.FromTo(1, 10))
	fmt.Print(piscine.FromTo(10, 1))
	fmt.Print(piscine.FromTo(10, 10))
	fmt.Print(piscine.FromTo(100, 10))
}

And its output:

$ go run . | cat -e
01, 02, 03, 04, 05, 06, 07, 08, 09, 10$
10, 09, 08, 07, 06, 05, 04, 03, 02, 01$
10$
Invalid$