b64 := []byte("float64:")
	b64 = strconv.AppendFloat(b64, 3.1415926535, 'E', -1, 64)
	fmt.Println(string(b64))

	// Output:
	// float32:3.1415927E+00
	// float64:3.1415926535E+00
}

func ExampleAppendInt() {
	b10 := []byte("int (base 10):")
	b10 = strconv.AppendInt(b10, -42, 10)
	fmt.Println(string(b10))

	b16 := []byte("int (base 16):")
	b16 = strconv.AppendInt(b16, -42, 16)
	fmt.Println(string(b16))