Switch in Go

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)

Next Article

Structs in Go