func main() {
    fmt.Println(rand.Intn(100))
    //設(shè)置隨機數(shù)種子，由于種子數(shù)值，每次啟動都不一樣
    //所以每次隨機數(shù)都是隨機的
    rand.Seed(time.Now().UnixNano())
    //隨機生成100以內(nèi)的正整數(shù)
    fmt.Println(rand.Intn(100))
}

package main
 
import (
    "crypto/rand"
    "encoding/binary"
    "fmt"
    "time"
)
 
func main() {
    var n int32
    binary.Read(rand.Reader, binary.LittleEndian, &n)
    fmt.Println(n)
}

package main
 
import (
    "fmt"
    "math/rand"
    "time"
)
 
func main() {
    fmt.Println(randomString(6, 0))
}
 
/**
* size 隨機碼的位數(shù)
* kind 0    // 純數(shù)字
       1    // 小寫字母
       2    // 大寫字母
       3    // 數(shù)字、大小寫字母
*/
func randomString(size int, kind int) string {
    ikind, kinds, rsbytes := kind, [][]int{[]int{10, 48}, []int{26, 97}, []int{26, 65}}, make([]byte, size)
    isAll := kind > 2 || kind < 0
    rand.Seed(time.Now().UnixNano())
    for i := 0; i < size; i++ {
        if isAll { // random ikind
            ikind = rand.Intn(3)
        }
        scope, base := kinds[ikind][0], kinds[ikind][1]
        rsbytes[i] = uint8(base + rand.Intn(scope))
    }
    return string(rsbytes)
}