Two kinds of comments in golang (detailed syntax explanation)

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

Single-line comments

Single-line comments are comments starting with //. For example:

// 这是一个单行注释

After a single line comment, everything until the end of the line will be treated as a comment.

Multi-line comments

Multi-line comments start with /* and end with */, and the content in between will be regarded as comments. For example:

/*
这是一个多行注释。
可以在这里写很多行的注释内容。
*/

Multi-line comments are usually used to add comments to functions, structures, constants, variables, etc. in the code.

Common uses:

1. Code function comments: Add single-line comments or multi-line comments in front of code blocks such as functions and structures to describe their functions, parameters, return values, etc. Increase code readability.

// Add 是一个加法函数，参数 a 和 b 分别为两个被加数，返回它们的和。
func Add(a, b int) int {
    return a + b
}

2. Code debugging comments: Add comments to the code to facilitate debugging. For example, add some print statements to output debugging information.

func main() {
    name := "Lucas"
    // 打印 name 变量的值
    fmt.Println(name)
}

3. Quickly comment and uncomment code: When you need to temporarily comment some code, you can use single-line comments or multi-line comments.

// fmt.Println("Hello, world!")
fmt.Println("Hello, Golang!")

4. Automatically generate documentation: Use comments in the code and combine it with some tools to automatically generate documentation.

Comment syntax is a very important part of the Go language. It will have a direct impact on the readability and maintainability of the code. When writing code, we need to add comments reasonably according to different situations to make it easier for ourselves and others to understand the intention of the code.

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