Switch in Go
Golang Concepts
Switch
Switch statement used to express conditionals across many branches.
Here is example of swith statement -
1. Basic switch statement
//basic switch statement
i := 1
fmt.Print("Write ", i, " as ")
switch i {
case 1:
fmt.Println("one")
case 2:
fmt.Println("two")
case 3:
fmt.Println("three")
}
2. Switch with multiple statement
switch time.Now().Weekday() {
// coma separated multiple statement
case time.Saturday, time.Sunday:
fmt.Println("It's the weekend")
default:
fmt.Println("It's a weekday")
}
3. Switch without an expression
t := time.Now()
switch {
case t.Hour() < 12:
fmt.Println("It's before noon")
default:
fmt.Println("It's after noon")
}
4. A type switch compares types instead of values
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)