Learn the os.Mkdir function in Go language documentation to create a directory

To learn the os.Mkdir function in the Go language document to create a directory, specific code examples are required

Go language is a statically typed, compiled, and concurrent program Design language, with high execution efficiency and good concurrency performance, has been widely used in the development of modern computer systems. In the Go language, the operation of creating a directory is also one of the basic operations. In order to facilitate us to become familiar with the os.Mkdir function in the Go language to create a directory, this article will provide you with specific code examples.

1. os.Mkdir function introduction

The os.Mkdir function is a function used to create directories in the Go language. Its function prototype is:

func Mkdir(name string, perm FileMode) error

The parameter name represents the name of the directory to be created, and the parameter perm represents the permissions of the directory to be created. Among them, the permission parameter perm is a parameter of type os.FileMode. The os.FileMode type is a type used to represent file or directory permissions and types.

If the function is successfully executed, nil is returned, otherwise a non-nil error type is returned.

2. Specific usage of os.Mkdir function

Now, let’s look at a specific code example to show how to use the os.Mkdir function to create a directory.

package main

import (
    "fmt"
    "os"
)

func main() {
    err := os.Mkdir("testdir", 0777)
    if err != nil {
        fmt.Println("创建目录失败：", err.Error())
    } else {
        fmt.Println("创建目录成功：testdir")
    }
}

In the above code, we first imported the fmt and os packages, which are used for console output and directory creation operations respectively. Then, in the main function, we called the os.Mkdir function to create a directory named testdir. Since in Unix/Linux systems, the directory permissions default to 0777, so when we call the os.Mkdir function, we can set the permission parameter perm to 0777.

After the function call is completed, we also need to judge the function return value err. If the directory is created successfully, the return value err should be nil, otherwise err should be a non-nil type. In this example, we use the form of if statement to judge the function return value and output the relevant result information.

3. Conclusion

Through the above code example, we can see that calling the os.Mkdir function to create a directory is very simple, and detailed parameters are also provided in the Go language documentation Description and return value description help developers better understand how to use the function. At the same time, during the actual development process, we also need to pay attention to permission settings and judgment of function return values ​​to ensure the correctness and reliability of the program.

The above is the detailed content of Learn the os.Mkdir function in Go language documentation to create a directory. For more information, please follow other related articles on the PHP Chinese website!