gosoup

benchmarks.go

func GetANumber() int {
   rand.Seed(time.Now().UnixNano()) // different seed every time
   return rand.Intn(100)            // generate a random number
}

func BenchmarkGetANumber(b *testing.B) {
   for i := 0; i < b.N; i++ {
      GetANumber()
   }
}

errors.go

func Divide(x float32, y float32) (float32, error) {
   if y == 0 {
      return 0, errors.New("division by zero") // an error occurred
   }
   return x / y, nil // result and no error
}

func DivisionRunner(x float32, y float32) {
   result, err := Divide(x, y)

   if err == nil {
      fmt.Printf("%v / %v = %v", x, y, result)
   } else {
      fmt.Printf("error: %v", err)
   }
}