What are the golang packages?

Go language is a brand-new programming language with the characteristics of simplicity, efficiency, and native support for concurrency. At the same time, it also has some very useful packages. This article will introduce some commonly used Golang packages.

1. fmt package

The fmt package provides the function of formatting input and output, making the input and output streams easier to operate. It supports various output methods, such as formatting strings, printing data types, and printing error messages.

When using the fmt package, you can usually use printing functions, such as Println(), Printf(), Print() and Sprintf(), etc.

2. os package

The os package provides some functions that can be used to operate files, directories and processes of the operating system. For example, the Chdir() function can change the working directory, the Mkdir() function can create a new directory, the Exec() function can execute a new program, etc.

os package also provides some functions to help developers manage environment variables. For example, the Getenv() function can obtain the value of environment variables, the Setenv() function can set new environment variables, and Unsetenv() Functions can delete environment variables.

3. net package

net package provides some functions that can be used to implement network programming. For example, the Dial() function can connect to a remote host, and the Listen() function can Listening port, etc.

When using this package, you can create a TCP connection and implement the communication process. This package also provides some functionality such as HTTP client and server functionality.

4. time package

The time package provides functions for processing and formatting date and time data. Among them, the Now() function can obtain the current time, the Parse() function can convert a string into a time object, and the Format() function can convert the time into a formatted string.

5. encrypt package

The crypt package provides some encryption and decryption functions, such as MD5, SHA, HMAC, etc. They can be used to implement many different security and encryption and decryption functions.

6. bufio package

bufio package provides some cached input/output functions. For example, when reading or writing large files, you can use commands in the bufio package to cache data to increase performance and reduce system overhead.

7. strconv package

The strconv package provides some functions for conversion between strings and basic data types. For example, the Atoi() function can convert a string to an int type, the Itoa() function can convert an int type to a string type, and so on.

Summary:

Golang’s standard library provides a rich set of packages covering many different aspects. The above packages are only part of them. If you want to know more about the packages and their functions, you can refer to the official documentation and the Golang community. Using these packages can help us complete application development faster and more efficiently.

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