How to generate random numbers or random integers in Go?

In Go, you can use the math/rand package to generate random numbers or random integers. Here's how you can do it:

Import the required packages:

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

In the main function or any other function where you want to generate random numbers, seed the random generator with a unique value, such as the current time:

func main() {
    rand.Seed(time.Now().UnixNano())
    // Rest of your code
}

Seeding ensures that each time your program runs, it generates a different sequence of random numbers.

Generate a random number within a specific range:

// Random number between 0 and 99
randomNum := rand.Intn(100)

In the above example, rand.Intn(n) generates a random integer in the range [0, n). The upper bound is exclusive, so rand.Intn(100) will generate random numbers from 0 to 99.

Generate a random integer within a specific range:

// Random integer between 10 and 20
randomInt := rand.Intn(11) + 10

In this example, rand.Intn(11) generates a random number between 0 and 10, and we add 10 to shift the range to 10-20.

Print the generated random number or integer:

fmt.Println(randomNum)
fmt.Println(randomInt)

That's it! Run your program, and you'll see different random numbers or integers each time.