What do comments mean in go language?

Comments are explanations and descriptions of the code. Its purpose is to allow people to understand the code more easily; comments are when writing a program, the person who writes the program gives an explanation or prompt for a statement, program segment, function, etc. , can improve the readability of program code. There are two types of comments in the Go language: 1. Single-line comments, with the syntax "//single-line comment"; 2. Multi-line comments, starting with "/*" and ending with "*/", and cannot be nested. Syntax "/*comment content...*/".

The operating environment of this tutorial: Windows 7 system, GO version 1.18, Dell G3 computer.

What do comments mean

Comments are explanations and descriptions of the code, and their purpose is to make it easier for people to understand the code. Comments are when the programmer writes an explanation or hint for a statement, program segment, function, etc., which can improve the readability of the program code.

The role of comments in the program is to annotate and explain the program to facilitate reading of the source code. The compilation system will automatically ignore the commented part when compiling the source code, so the comments will not play any role in realizing the function of the program. Appropriately adding comments to the source code can improve the readability of the source code.

No matter what programming language you use, adding comments to your code is necessary. Most projects require a period of time to complete development and testing, and they also need to deal with iterative updates of the product after it is finally launched. However, it is no exaggeration to say that even if only a week apart, we may not be able to read the code, even if the code is written by ourselves. At this point, comments can be a great help in understanding the code.

Comments in go language

In Go language, comments are divided into two categories: single-line comments and multi-line comments.

• Single-line comments, referred to as line comments, are the most common form of comments. Single-line comments starting with // can be used anywhere;

• Multi-line comments are referred to as block comments, starting with /* and ending with */, and cannot be nested. Multi-line comments are generally used in packages. Document descriptions or comment code snippets into chunks.

Single-line comments

Single-line comments are also called line comments. The format is a line starting with "//" , can be added anywhere in the code.

For example, a line of comments is added to the following code to explain the function of the next line of code:

package main
import "fmt"
func main(){
    //输出"Hello World!"文字
    fmt.Println("Hello World!")
}

It should be noted that when using comments, do not comment them together with the code. Because the commented code will not be executed. However, when modifying the code, you can use this feature to temporarily comment out the modified code instead of deleting it directly, so that you can easily restore them when necessary.

To add blank lines, you can follow the following format:

//第1行
//
//第3行
//第4行

Multi-line comments

Multi-line comments are also called block comments, format One or more lines starting with "/*" and ending with "*/".

For example, add a multi-line comment above the main() function to explain the function of the main() function:

/*
main()函数是Go程序的入口函数
是程序运行的起点
此处输出"Hello World!"
用于验证开发环境配置
*/
func main(){
    //输出"Hello World!"文字
    fmt.Println("Hello World!")
}

Unlike single-line comments, multi-line comments are not allowed to be nested. Because this will cause a compile-time error and the compilation will not be completed. An example is as follows:

/*
main()函数是Go程序的入口函数
/*是程序运行的起点
此处输出"Hello World!"
*/
用于验证开发环境配置
*/

If you want to add blank lines, you can implement it in the following format:

/*
第1行

第3行
第4行
*/

Code is written for people to read. Developing good coding habits is not only beneficial to the coding itself, but also Provides great support to teammates on the development team. In actual development, the cost of communication between personnel may be huge to a "terrible" level, so please keep this in mind.

【Related recommendations: Go video tutorial, Programming teaching】

The above is the detailed content of What do comments mean in go language?. For more information, please follow other related articles on the PHP Chinese website!