Go by Example: Switch

Go by Example : Switch

Switch statements express conditionals across many branches.
	`package main`
	`import ( "fmt" "time" )`
	`func main() {`
Here’s a basic `switch`.	`i := 2 fmt.Print("Write ", i, " as ") switch i { case 1: fmt.Println("one") case 2: fmt.Println("two") case 3: fmt.Println("three") }`
You can use commas to separate multiple expressions in the same `case`statement. We use the optional `default`case in this example as well.	`switch time.Now().Weekday() { case time.Saturday, time.Sunday: fmt.Println("It's the weekend") default: fmt.Println("It's a weekday") }`
`switch`without an expression is an alternate way to express if/else logic. Here we also show how the `case`expressions can be non-constants.	`t := time.Now() switch { case t.Hour() < 12: fmt.Println("It's before noon") default: fmt.Println("It's after noon") }`
A type `switch`compares types instead of values. You can use this to discover the type of an interface value. In this example, the variable `t`will have the type corresponding to its clause.	`whatAmI := func(i interface{}) { switch t := i.(type) { case bool: fmt.Println("I'm a bool") case int: fmt.Println("I'm an int") default: fmt.Printf("Don't know type %T\n", t) } } whatAmI(true) whatAmI(1) whatAmI("hey") }`

$ go run switch.go 
Write 2 as two
It's a weekday
It's after noon
I'm a bool
I'm an int
Don't know type string

Next example: Arrays .