golang type switch code example

Example 1: type switch golang

var x interface{} = "foo"

switch v := x.(type) {
case nil:
    fmt.Println("x is nil")            // here v has type interface{}
case int: 
    fmt.Println("x is", v)             // here v has type int
case bool, string:
    fmt.Println("x is bool or string") // here v has type interface{}
default:
    fmt.Println("type unknown")        // here v has type interface{}
}

Example 2: go switch

package main

import (
	"fmt"
	"runtime"
)

func main() {
	fmt.Print("Go runs on ")
	switch os := runtime.GOOS; os {
	case "darwin":
		fmt.Println("OS X.")
	case "linux":
		fmt.Println("Linux.")
	default:
		// freebsd, openbsd,
		// plan9, windows...
		fmt.Printf("%s.\n", os)
	}
}

Example 3: golang switch

package main

import (
	"fmt"
	"time"
)

func main() {

	isDay := time.Sunday

	switch isDay {
	case time.Monday:
		fmt.Println("day is monday")
	case time.Sunday:
		fmt.Println("day is sunday")
	case time.Tuesday:
		fmt.Println("day is tuesday")
	case time.Wednesday:
		fmt.Println("day is wenesday")
	case time.Thursday:
		fmt.Println("day is thursday")
	case time.Friday:
		fmt.Println("day is friday")
	case time.Saturday:
		fmt.Println("day is saturday")
	default:
		fmt.Println("day is not exist")
	}

	// multiple check
	switch browser := "firefox"; browser {
	case "chrome", "opera", "firefox":
		fmt.Println("my browser is", browser)
	default:
		fmt.Println("browser is not define")
	}

    // iflese style
	 var point = 6
      switch {
      case point == 8:
          fmt.Println("perfect")
      case (point < 8) && (point > 3):
          fmt.Println("awesome")
      default:
          {
              fmt.Println("not bad")
              fmt.Println("you need to learn more")
          }
      }
  
}