厚土Go学习笔记 | 03. 数学运算的随机数

package main

import(
    "fmt"
    "math/rand"
)

func main(){
    fmt.Println("My random number is",  rand.Intn(190))
}

package main

import(
    "fmt"
    "math/rand"
    "time"
)

func main(){
    r := rand.New(rand.NewSource(time.Now().UnixNano()))
    fmt.Println("My random number is", r.Intn(190))
}

package main

import(
    "fmt"
    "math/rand"
    "time"
)

func main(){
    rand.Seed(time.Now().UnixNano())
    fmt.Println("My random number is", rand.Intn(190))
}