To write the “Hello, World!” program, first open up your preferred web browser’s JavaScript Console. JavaScript alert 사용해서 Hello World 띄우기 ㆍ 이번글에서는 HTML의 기본구조에서 JavaScript alert코드를 추가해서 Hello World를 띄워보도록 하겠습니다. It is important to use the JavaScript prompt() method only when it makes sense within the context of the program, as overusing it can become tedious for the user. There are two primary ways that we can go about creating the “Hello, World!” program in JavaScript, with the alert() method and with the console.log()method. const hello = "Hello"; // You can see on the right the result of the TypeScript compiler: this is vanilla JavaScript which can run on browsers, servers or anywhere really. Hello world ! Christina Kopecky. For a user named Sammy, the output on the Console will be as follows: You now have a JavaScript program that takes input from a user and prints it back to the screen. to ask the user for their name. Once you press the ENTER key following your line of JavaScript, you should see the following alert pop up in your browser: The Console will also print the result of evaluating an expression, which will read as undefined when the expression does not explicitly return something. There are two ways to create the program: in the terminal or in your code editor of choice (i.e. The objective of this program is simple: output the text “Hello World” on a computer screen. This JavaScript example writes "Hello JavaScript!" We’ll end our JavaScript statement with a semicolon. For instance, src="script.js" would mean a file "script.js" in the current folder. Here "//" signifies a comment in JavaScript, so we add that to prevent a browser from reading the end of the HTML comment as a piece of JavaScript code. A single