Javascript Basics Development Tutorials, Guides & Insights

   const PI = 3.1416;
   let radius = 5;
   let area = PI * radius ** 2;
   console.log("Area:", area); // Area: 78.54

   let number = 7;
   if (number % 2 === 0) {
     console.log(number + " is even.");
   } else {
     console.log(number + " is odd."); // Outputs: 7 is odd.
   }

     // This is a single-line comment
     console.log("Hello, World!"); // Outputting to the console

• Enclosed within /<em> </em>/.
• Example:

<button id="alertButton">Click Me</button>

<script>
document.getElementById('alertButton').addEventListener('click', function() {
    alert('Button clicked!');
});
</script>

Congratulations! You now have a basic understanding of JavaScript. You’ve learned how to declare variables, use operators, write conditional statements, loops, and functions, interact with the DOM, and handle events. JavaScript is a powerful language that allows you to create interactive web pages and dynamic user experiences.

Conditional statements allow you to perform different actions based on different conditions.

let score = 85;

if (score >= 90) {
  console.log("A");
} else if (score >= 80) {
  console.log("B");
} else if (score >= 70) {
  console.log("C");
} else {
  console.log("D");
}