HTML vs CSS vs JavaScript: What’s the Difference?

 

Introduction

If you’re starting web development, the first question is always the same:
What is the difference between HTML, CSS, and JavaScript?
These three languages work together to build every website on the internet.

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What Is HTML? (Structure)

HTML stands for HyperText Markup Language.
It gives structure to a webpage — headings, images, paragraphs, buttons, etc.

Example:

<h1>Welcome to My Website</h1>
<p>This is a paragraph.</p>

Without HTML, there is no content.

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What Is CSS? (Design & Style)

CSS stands for Cascading Style Sheets.
It controls how the HTML looks — colors, fonts, layout, spacing.

Example:

h1 {
  color: blue;
}
p {
  font-size: 18px;
}

HTML = skeleton
CSS = beauty / design

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What Is JavaScript? (Logic & Interaction)

JavaScript makes the website interactive.

Example:

alert("Welcome to my site!");

JavaScript adds:

• Click events

• Animations

• Dynamic content

• Form validation

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How They Work Together

A website is like a house:

• HTML = walls and rooms

• CSS = paint and decoration

• JavaScript = electricity and automation

All three must work together for a complete, modern website.

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Conclusion

HTML structures the page, CSS styles it, and JavaScript adds interaction.
If you want to become a web developer, start by mastering these three.