1 // Copyright 2011 The Go Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style 3 // license that can be found in the LICENSE file. 4 5 package rand_test 6 7 import ( 8 "bytes" 9 "crypto/rand" 10 "fmt" 11 ) 12 13 // This example reads 10 cryptographically secure pseudorandom numbers from 14 // rand.Reader and writes them to a byte slice. 15 func ExampleRead() { 16 c := 10 17 b := make([]byte, c) 18 _, err := rand.Read(b) 19 if err != nil { 20 fmt.Println("error:", err) 21 return 22 } 23 // The slice should now contain random bytes instead of only zeroes. 24 fmt.Println(bytes.Equal(b, make([]byte, c))) 25 26 // Output: 27 // false 28 } 29
