Added error handling tutorial solution inside error_handling folder

Author: anarchymonkey

error_handling/car/car.go

@@ -0,0 +1,15 @@
+package car
+
+import (
+	"errors"
+	"fmt"
+)
+
+func StartCar(carName string) (string, error) {
+	if carName == "" {
+		return "", errors.New("there has been some error! Cannot send empty car name")
+	}
+	message := fmt.Sprintf("Starting car, name of the car is %v", carName)
+
+	return message, nil
+}

error_handling/car/go.mod

@@ -0,0 +1,3 @@
+module aniket-batabyal.com/car
+
+go 1.20

error_handling/driver/driver.go

@@ -0,0 +1,17 @@
+package main
+
+import (
+	"fmt"
+
+	"aniket-batabyal.com/car"
+)
+
+func main() {
+	fmt.Println("Hey I am a driver")
+	message, error := car.StartCar("Ford Mustang")
+
+	if error != nil {
+		fmt.Println(error)
+	}
+	fmt.Println("The message is: ", message)
+}

error_handling/driver/go.mod

@@ -0,0 +1,7 @@
+module aniket-batabyal.com/driver
+
+go 1.20
+
+replace aniket-batabyal.com/car => ../car
+
+require aniket-batabyal.com/car v0.0.0-00010101000000-000000000000