How to generate pseudo-random number sequence in Golang?

Use the crypto/rand package in Golang to generate a secure and unpredictable pseudo-random number sequence. The specific method is: import the crypto/rand package. Use rand.Reader to generate random numbers from an int64 range. Use the binary.Read function to read random numbers.

Generate pseudo-random number sequence in Golang

Introduction

Pseudo-random number sequence is unpredictable, but can be determined from known The sequence of numbers reproduced in the seed. In Golang, secure and unpredictable pseudo-random number sequences can be generated using the crypto/rand package.

Code Example

package main

import (
    "crypto/rand"
    "encoding/binary"
    "fmt"
)

// 从 int64 范围生成随机数
func randomInt64() int64 {
    var n int64
    binary.Read(rand.Reader, binary.LittleEndian, &n)
    return n
}

func main() {
    // 生成 10 个随机整数
    for i := 0; i < 10; i++ {
        fmt.Println(randomInt64())
    }
}

Practical Case

Using this method, you can generate random passwords, session tokens, or any other situation that requires unpredictable sequences.

Other methods

In addition to the crypto/rand package, Golang also provides the math/rand package, which provides a A function that repeats pseudorandom numbers. However, it is not recommended for use in scenarios that require security or are unpredictable.

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