Switch

1flow/switch.go

@@ -0,0 +1,43 @@
+package main
+
+import (
+	"fmt"
+	"runtime"
+	"time"
+)
+
+func main() {
+	fmt.Println("Shorter way for lots of if else")
+	fmt.Println("No need to break after each statement")
+	fmt.Println("switch cases need not be constants, and the values involved need not be integers.")
+
+	os := runtime.GOOS
+
+	switch os {
+	case "windows":
+		fmt.Println("You are using windows")
+	case "linux":
+		fmt.Println("You are using linux")
+	default:
+		fmt.Printf("You are using %s\n", os)
+	}
+
+	fmt.Println()
+
+	fmt.Println("Also you can add short statement before condition too")
+	// like: switch os := runtime.GOOS; os { . . . }
+
+	fmt.Println()
+
+	fmt.Println("You can use switch with no condition, this is same as `switch true`")
+	t := time.Now()
+	fmt.Println(t)
+	switch {
+	case t.Hour() < 12:
+		fmt.Println("Good morning!")
+	case t.Hour() < 17:
+		fmt.Println("Good afternoon.")
+	default:
+		fmt.Println("Good evening.")
+	}
+}