package main

import (
    "fmt"
    "math/rand"
)

func main() {
    z := 1
    switch z {
        // rand.Intn(10) == 1 as it uses the default seed
        // anyway, the point is that we're calling a
        // function in switch
        case rand.Intn(10):
            fmt.Println("yay ;)")
        case 100:
            fmt.Println("nope :(")
    }
}