JS Basics _ Basic Syntax

1 <!DOCTYPE HTML>2 <HTML>3     <Head>4         <MetaCharSet= "UTF-8">5         <title></title>6         <Scripttype= "Text/javascript">7             8             /*9 Multi-line commentsTen JS Comment One multiple lines of comment, the content in the comment is not executed, but can be viewed in the source code A to develop a good habit of writing annotations, you can also use annotations to do some simple debugging of your code. -              */ -              the             //single-line comment -             //alert ("Hello"); -             //document.write ("Hello"); - Console.log ("Hello"); //This statement is used to output a log in the console +              -             /* + * Strict case sensitivity in 1.JS A * Each statement in 2.JS ends with a semicolon (;) at *-If you do not write a semicolon, the browser will automatically add, but will consume some system resources, and sometimes, the browser will add the wrong semicolon, so in the development of the semicolon must write - * Multiple spaces and line breaks are ignored in 3.JS, so we can format the code with spaces and line breaks -              *  -              */ -              - Alert ("Hello"); in                              -                              to              +         </Script> -     </Head> the     <Body> *          $     </Body>Panax Notoginseng </HTML>

JS Basics _ Basic Syntax