rand.Seed(time.Now().UnixNano())作用

packagemain

import(

    "fmt"

    "math/rand"

    "time"

)

funcmain() {

    rand.Seed(time.Now().Unix())

    fmt.Println("My first lucky number is", rand.Intn(10))

    fmt.Println("My senond lucky number is", rand.Intn(10))

}