You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: values.go
    path of file: ./repos/gobyexample/examples/values
    
    the code of the file until where you have to start completion: // Go 拥有多种值类型，包括字符串、整型、浮点型、布尔型等。
// 下面是一些基础的例子。

package main

import "fmt"
    
func main() {

	// 字符串可以通过 `+` 连接。
	fmt.Println("go" + "lang")

	// 整数和浮点数
	fmt.Println("1+1 =", 1+1)
	fmt.Println("7.0/3.0 =", 7.0/3.0)

	// 布尔型，以及常见的布尔操作。
	fmt.Println(true && false)
	fmt.Println(true || false)
	fmt.Println(!true)
}