adding functions

Author: symonk

README.md

@@ -23,7 +23,7 @@ all the examples `Run` functions sequentially in line with the table of contents
 * [09 - Slices](slices/main.go)
 * [10 - Maps](maps/main.go)
 * [11 - Range](ranges/main.go)
-* [...]
+* [12 - Functions](functions/main.go)
 * [25 - Timers](timers/main.go)
 * [26 - Tickers](tickers/main.go)
 * [27 - WorkerGroups](workergroups/main.go)

functions/main.go

@@ -0,0 +1,26 @@
+package functions
+
+import "fmt"
+
+func Run() {
+	noReturnFunction()
+	functionWithArgs(1, 2, 3, 4, 5)
+	functionSingleReturn()
+	functionMultipleReturnValues()
+}
+
+func noReturnFunction() {
+	fmt.Println("I return nothing, implicitly")
+}
+
+func functionWithArgs(args ...any) {
+	fmt.Println(args...)
+}
+
+func functionSingleReturn() int {
+	return 10
+}
+
+func functionMultipleReturnValues() (int, string, float64) {
+	return 1, "two", 3.00
+}