// [pseudorandom number](http://en.wikipedia.org/wiki/Pseudorandom_number_generator)

// generation.

​

package main

​

import "fmt"

import "math/rand"

​

func main() {

​

    // For example, `rand.Intn` returns a random `int` n,

    // `0 <= n < 100`.

    fmt.Print(rand.Intn(100), ",")

    fmt.Print(rand.Intn(100))

    fmt.Println()

​

    // `rand.Float64` returns a `float64` `f`,

    // `0.0 <= f < 1.0`.

    fmt.Println(rand.Float64())

​

    // This can be used to generate random floats in

    // other ranges, for example `5.0 <= f' < 10.0`.

    fmt.Print((rand.Float64()*5)+5, ",")

    fmt.Print((rand.Float64() * 5) + 5)

    fmt.Println()

​

    // To make the pseudorandom generator deterministic,

    // give it a well-known seed.

    s1 := rand.NewSource(42)

    r1 := rand.New(s1)

​

    // Call the resulting `rand.Rand` just like the

    // functions on the `rand` package.

    fmt.Print(r1.Intn(100), ",")

    fmt.Print(r1.Intn(100))

    fmt.Println()

​

    // If you seed a source with the same number, it

    // produces the same sequence of random numbers.

    s2 := rand.NewSource(42)

    r2 := rand.New(s2)

    fmt.Print(r2.Intn(100), ",")

    fmt.Print(r2.Intn(100))

    fmt.Println()

}

​