add: questions and exercises for the if statement

11-if/exercises/05/solution/main.go

@@ -0,0 +1,34 @@
+// For more tutorials: https://blog.learngoprogramming.com
+//
+// Copyright © 2018 Inanc Gumus
+// Learn Go Programming Course
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+//
+
+package main
+
+import (
+	"fmt"
+	"os"
+	"strconv"
+)
+
+func main() {
+	if len(os.Args) != 2 {
+		fmt.Println("Requires age")
+		return
+	}
+
+	age, err := strconv.Atoi(os.Args[1])
+
+	if err != nil || age < 0 {
+		fmt.Printf(`Wrong age: %q`+"\n", os.Args[1])
+		return
+	} else if age > 17 {
+		fmt.Println("R-Rated")
+	} else if age >= 13 && age <= 17 {
+		fmt.Println("PG-13")
+	} else if age < 13 {
+		fmt.Println("PG-Rated")
+	}
+}