diff --git a/lesson8/09_comparable_variable_types.go b/lesson8/09_comparable_variable_types.go
new file mode 100644
index 0000000..2ab5814
--- /dev/null
+++ b/lesson8/09_comparable_variable_types.go
@@ -0,0 +1,24 @@
+// In Go version < 1.18 it was not easy to make variant
+// of such function for multiple data types.
+
+package main
+
+import "fmt"
+
+func compareInts(x int, y int) bool {
+	return x < y
+}
+
+func compareFloats(x float64, y float64) bool {
+	return x < y
+}
+
+func compareStrings(x string, y string) bool {
+	return x < y
+}
+
+func main() {
+	fmt.Println(compareInts(1, 2))
+	fmt.Println(compareFloats(1.5, 2.6))
+	fmt.Println(compareStrings("foo", "bar"))
+}