check to see if something is ASCII or not

isascii.go

package main

import "fmt"

func isASCII(s string) bool {
   for _, c := range s {
      if c > 127 {
         return false
      }
   }
   return true
}

func main() {
   fmt.Println(isASCII("Hello, playground"))
   fmt.Println(isASCII("ಠ_ಠ"))
}