The comment syntax in JavaScript is

In JavaScript programming, comment syntax is an essential part of writing high-quality code. Comments can improve code readability and maintainability, and can help other developers understand the intent of the code. In this article, we will explore comment syntax in JavaScript.

There are two types of comments in JavaScript: single-line comments and multi-line comments. Let's look at single-line comments first.

Single-line comments:

Single-line comments start with two slashes (//). If there is a space immediately after the slash, it can improve the readability of the code in moderate cases. sex.

For example:

// 这是一个单行注释

Multi-line comments:

Multi-line comments can insert large comment content in the code to describe the code, explain the code or add any other relevant information. Multi-line comments start with a slash and an asterisk combination that starts the comment. The comment content can end after the asterisk and end with a combination of an asterisk and a slash.

For example:

/*
这是一个
多行注释
*/

Comments can make the code easier to understand and maintain. During the development process, we should maintain good commenting habits. For important functions or complex algorithms, we should add detailed comments to cover the meaning of each step and variables. Comments should be clear and concise and should not conflict with or duplicate the code.

In addition to the above comment types, there is also a tag type comment in JavaScript. It can help you generate API documentation or other documentation. Comments for tag types start with a slash and an asterisk, followed by special codes such as "@param", "@return", "@description", etc. These tags can be used in API documentation to generate descriptions of functions and classes.

For example:

/**
 * 计算两个数的差值
 * @param {number} num1 - 减数
 * @param {number} num2 - 被减数
 * @returns {number} 差值
 */
function subtract(num1, num2) {
  return num1 - num2;
}

In this example, we use tag type annotations to provide some additional description for the function, including parameter names, types, and return values.

Comments are as important as code. Correct and appropriate comments can greatly improve the readability and maintainability of your code. In practice, we should develop a good habit of annotating every important function as well as annotation standards for markup types.

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