GOLANG学习9. 随机数

package main

import (

"fmt"

"math/rand"

"time"

)

func init() {

//随机种子纳秒级

rand.Seed(time.Now().UnixNano())

}

func main() {

//随机种子秒级

//rand.Seed(time.Now().Unix())

for i := 0; i < 10; i++ {

a := rand.Int()

fmt.Println(a)

}

//随机小于100的整数

for i := 0; i < 10; i++ {

a := rand.Intn(100)

fmt.Println(a)

}

for i := 0; i < 10; i++ {

a := rand.Float32()

fmt.Println(a)

}

}