Go Language - Switch Statement

A switch statement is a shorter way to write a sequence of if-else statements. It runs the first case whose value is equal to the condition expression. The cases are evaluated from top to bottom, stopping when a case succeeds. If no case matches and there is a default case, its statements are executed.

Example 1:

package main
import "fmt"
func main() {
    day := 6
    switch day {
    case 1:
        fmt.Println("Sunday")
    case 2:
        fmt.Println("Monday")
    case 3:
        fmt.Println("Tuesday")
    case 4:
        fmt.Println("Wednesday")
    case 5:
        fmt.Println("Thursday")
    case 6:
        fmt.Println("Friday")
    case 7:
        fmt.Println("Saturday")
    }
}

Output:

Example 2: break breaks the inner switch 

package main
import "fmt"
func main() {
loop:
    for i := 0; i < 9; i++ {
        fmt.Printf("%d", i)
        switch {
        case i == 1:
            fmt.Println("start")
        case i == 8:
            fmt.Println("end")
        case i == 6:
            fmt.Println("stop")
            break loop
        case i > 3:
            fmt.Println("sleeping..")
            break
        default:
            fmt.Println("default..")
        }
    }
}

Output: