How to comment in a single line in javascript

In JavaScript, a single-line comment is represented by double forward slashes "//", which can be used before and after a statement. Its syntax is such as "//This is a single-line comment", which means "//" All characters after the symbol until the end of the line will be ignored by JavaScript.

The operating environment of this article: Windows 7 system, javascript1.8.5, Dell G3 computer.

How to comment in a single line in javascript?

Single-line comments

In JavaScript, single-line comments are represented by double forward slashes (//) and can be used before and after a statement.

Syntax:

// 你的代码在这里

All characters following the // syntax until the end of the line will be ignored by javascript.

Example 1: Add

<script>
//这是单行注释
document.write("hello javascript");
</script>

before the statement Example 2: Add

<script>  
var a=10;  
var b=20;  
var c=a+b; 
document.write(c);//输出10和20之和  
</script>

after the statement Related video tutorial sharing: javascript advanced video

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