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Go_Select.go

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+//Every stand-alone go program must have a main package
+package main
+
+//fmt package - to print out statements
+import "fmt"
+//time package - to deal with time
+import "time"
+//os package - to perform OS functionalities
+import"os"
+
+//Function of utilizing select block
+//Select block is similar to switch but used in case of channels
+func Select_func(c chan int, end chan string){
+
+	//Infinite for is used to use all the values in the select block
+	//If not used, only first value will be used
+	for{
+
+		select{
+
+		case <-c :   fmt.Println("Received")					 
+		case <-end : fmt.Println("End")
+					//To exit from the program after receiving the end signal
+					//If not used, leads to deadlock, as we are using select{} in main()
+					 os.Exit(0)
+					}
+		}
+
+	}
+
+//Entry point for the program
+func main() {
+
+	//Making two unbuffered channels
+	c := make(chan int)
+	end := make(chan string)
+	go func(){
+
+		c <- 1
+		end <- "END"
+	}()
+	//When using 2 or more Go Routines, give a sleep time of 1 second after every Go Routine to compensate for concurrency
+	time.Sleep(time.Second * 1)
+	go Select_func(c, end)
+	time.Sleep(time.Second * 1)
+	//SELECT - Waits Indefinitely by halting main statement from finishing
+	//User has to interrupt to end execution, else the program will be keep on running
+	//Returns deadlock - If For loop is finite
+	select{}
+}