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# golangHow to generate random string

This solution is based on Paul Hankins' code.

``````package main
import ( "time"; "math/rand" )

var letters = []rune("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ")

func rand_str(n int) string {
b := make([]rune, n)
for i := range b {
b[i] = letters[rand.Intn(len(letters))]
}
return string(b)
}

func main() {
rand.Seed(time.Now().UnixNano())
res := rand_str(30)
}```ctrl + cgithub```
 `package main`default package declaration `"math/rand"`lib for random numbers generation `rand.Seed(`init random generator with new seed `rand_str(`custom function that returns random string of a given length `make([]rune, n)`makes a map of a `n` elements `for i := range b {`iterate all `b` (map) elements `letters[rand.Intn(len(letters))]`populate each `b` element with random elements from `letters` array

### Usage example

``````package main
import ( "time"; "math/rand" )

var letters = []rune("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ")

func rand_str(n int) string {
b := make([]rune, n)
for i := range b {
b[i] = letters[rand.Intn(len(letters))]
}
return string(b)
}

func main() {
rand.Seed(time.Now().UnixNano())
res := rand_str(30)
print(res)
}``````
###### output
``iiSohqBecttbFDXygjOKhvzFxPabFd``