implement myMath module II

go/03-modules/myMath/math.go

@@ -0,0 +1,23 @@
+package myMath
+
+import "fmt"
+
+func init() {
+	fmt.Println("initializing myMath")
+}
+
+func Add(a, b int) int {
+	return a + b
+}
+
+func greater(a, b int) bool {
+	return a > b
+}
+
+func Min(a, b int) int {
+	if greater(a, b) {
+		return b
+	} else {
+		return a
+	}
+}