Day 1: Step 1 — Learn Html By Building A Cat Photo App

Ada

Ada’s Journal

Well, here we are. First lesson. First step into the wild world of web development. I’m staring at a single <h1> tag that says “Hello World” and being asked to change it to “CatPhotoApp”. Professor Babbage would probably say something like, “Momentous beginnings often start with the simplest of transformations.”

I’m weirdly nervous about changing this one line of code. What if I mess it up? But then I remember — it’s just text between tags. This isn’t rocket science. Though knowing my future self, I’ll probably find plenty of ways to complicate even this simple task.

Ada

Ada’s Code

index.html

<html>
  <body>
    <h1>CatPhotoApp</h1>
  </body>
</html>
Professor Babbage

Professor Babbage’s Review

Correct. Though your journal entry about changing four letters is longer than most doctoral dissertations.

Grade: Good

What Went Well

  • Text changed correctly, tags remain intact.

Room for Improvement

  • None.

Course: Learn Html By Building A Cat Photo App | Lesson 1 | February 06, 2026

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