add function return egs

Author: hegdeashwin

codes/ch2_functions/function-1-return.go

@@ -0,0 +1,40 @@
+package main
+
+import "fmt"
+
+/**
+ * User defined type Profile act as struct type
+ */
+type Profile struct {
+	name string
+	username string
+	message string
+}
+
+/**
+ * Define a CreateMessage function;
+ * Either specify string for each or just make string at last parameter and first 2 will be asssumed as string
+ * Also specify the return type which in case here is string
+ *
+ * func <function-name>([param1, param2, ...]) <return-type> { ... }
+ */
+func CreateMessage(name, username, message string) string {
+	return message + ", " + name + " (" + username + ")"
+}
+
+/**
+ * Define a Greeting function;
+ */
+func Greeting(github Profile) {
+	fmt.Println(CreateMessage(github.name, github.username, github.message))
+}
+
+func main() {
+
+	var github = Profile{"Ashwin Hegde", "hegdeashwin", "Welcome to Go world!"}
+
+	/**
+	 * Call the function and pass the data to the function
+	 */
+	Greeting(github)
+}

codes/ch2_functions/function-n-return.go

@@ -0,0 +1,47 @@
+package main
+
+import "fmt"
+
+/**
+ * User defined type Profile act as struct type
+ */
+type Profile struct {
+	name string
+	username string
+	message string
+}
+
+/**
+ * Define a CreateMessage function;
+ * Either specify string for each or just make string at last parameter and first 2 will be asssumed as string
+ * Also specify the return type which in case here is string
+ *
+ * func <function-name>([param1, param2, ...]) (<return-type1>, <return-type2>) { ... }
+ */
+func CreateMessage(name, username, message string) (string, string) {
+
+	/**
+	 * return <first-return>, <second-return>, ...
+	 */
+	return "\n" + message + " " + name, "You are authorize to access the system: " + username + "\n"
+}
+
+/**
+ * Define a Greeting function;
+ */
+func Greeting(github Profile) {
+	welcome, info := CreateMessage(github.name, github.username, github.message)
+
+	fmt.Println(welcome)	// Commenting this line would throw an error "welcome declared and not used"
+	fmt.Println(info)
+}
+
+func main() {
+
+	var github = Profile{"Ashwin Hegde", "hegdeashwin", "Welcome to Go world!"}
+
+	/**
+	 * Call the function and pass the data to the function
+	 */
+	Greeting(github)
+}