go_workshop/chapter_02/exercise_2.03/main.go

package main

import "fmt"

func main() {

  input := -10

  if input < 0 {
    fmt.Println("input can't be a negative number")
  } else if input%2 == 0 {
    fmt.Println(input, "is even")
  } else {
    fmt.Println(input, "is odd")
  }

}