<!-- Your first webpage -->
<h1>Hello World!</h1>
<p>Welcome to HTML learning.</p>
<button onclick="alert('Hi!')">Click me</button>

Press Run to see the output.

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lesson_01.html

<!-- Your first webpage -->
<h1>Hello World!</h1>
<p>Welcome to HTML learning.</p>
<button onclick="alert('Hi!')">Click me</button>

Press Run to see what this prints.

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