Introduction to JavaScript

JavaScript is a dynamic programming language that is widely used in frontend development. As a senior engineer interested in learning MERN stack (MongoDB, Express.js, React.js, and Node.js), having a strong foundation in JavaScript is crucial.

JavaScript is often referred to as the "language of the web" because it allows us to add interactivity and dynamic behavior to webpages. It plays a key role in frontend development by enabling us to manipulate the DOM (Document Object Model), handle user events, make API calls, and much more.

If you're coming from a Java backend development background with experience in Spring Boot and MySQL, you'll find many similarities between Java and JavaScript. Both languages share similar syntax and concepts, such as variables, loops, conditionals, and functions.

Let's dive into a quick example to see JavaScript in action:

1// Replace with logic relevant to content
2// Make sure to log something
3for (let i = 1; i <= 100; i++) {
4  if (i % 3 === 0 && i % 5 === 0) {
5    console.log("FizzBuzz");
6  } else if (i % 3 === 0) {
7    console.log("Fizz");
8  } else if (i % 5 === 0) {
9    console.log("Buzz");
10  } else {
11    console.log(i);
12  }
13}

In the above code snippet, we use JavaScript to print numbers from 1 to 100. However, if a number is divisible by 3, we print "Fizz". If a number is divisible by 5, we print "Buzz". And if a number is divisible by both 3 and 5, we print "FizzBuzz".

JavaScript offers a wide range of features and functionalities that make it a powerful tool for frontend development. By mastering JavaScript, you'll be able to build interactive and dynamic web applications using frameworks like React, Angular, or Vue.js.

Now that you have a basic understanding of JavaScript and its role in frontend development, let's continue our exploration of frontend technologies.

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const player = "Kobe Bryant";

console.log(player);