add some exaples, rotation this is for go course,

twonums this is a problem from leetcode

fizzbuzz/FizzBuzz.go

@@ -0,0 +1,35 @@
+package fizzbuzz
+
+import "fmt"
+
+func main() {
+	// for i := 1; i < 101; i++ {
+	// 	if i%15 == 0 {
+	// 		fmt.Print("FizzBuzz\n")
+	// 	} else if i%3 == 0 {
+	// 		fmt.Print("Fizz\n")
+	// 	} else if i%5 == 0 {
+	// 		fmt.Print("Buzz\n")
+	// 	} else {
+	// 		fmt.Println(i)
+	// 	}
+	// }
+
+	switchFB()
+}
+
+func switchFB() {
+	for i := 1; i < 101; i++ {
+		switch {
+		case i%15 == 0:
+			fmt.Println("FizzBuzz")
+		case i%3 == 0:
+			fmt.Println("Fizz")
+		case i%5 == 0:
+			fmt.Println("Buzz")
+		default:
+			fmt.Println(i)
+		}
+	}
+
+}