Source file src/crypto/rand/example_test.go

Documentation: crypto/rand

		 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  

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