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Updated: 2026年5月31日

Html Br

Original task (JA): 改行

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Conclusion

Html Br — free browser-based HTML practice

■ What this exercise teaches 「1行目」と「2行目」をbrタグで改行してください。

Why it matters in real projects

brは改行を挿入します。段落を分けたいときはpタグを複数使う方が一般的です。 Similar patterns appear daily in code review and production UI work.

Step-by-step workflow

1. Read the guide and understand the goal of "Html Br" 2. Review the HTML editor pane and start from the starter code 3. Open hints if stuck; compare your diff with the sample solution 4. Click Run and inspect preview/console output 5. Auto-check looks for output containing: <br, 1行目, 2行目. 6. After success, continue with adjacent exercises in the same category

Core concept explained

brは改行を挿入します。段落を分けたいときはpタグを複数使う方が一般的です。

Technical focus

Key HTML elements in this task: p, br.

Hint before you peek at the solution

brは改行の自己閉じタグです。

Sample solution walkthrough

The solution uses HTML tags such as p, br. Check nesting and closing tags. Explanation: brは改行を挿入します。段落を分けたいときはpタグを複数使う方が一般的です。 Hint recap: brは改行の自己閉じタグです。

Solution code

📝 Sample code
<p>1行目<br>2行目</p>

Common mistakes for this exact task

・Skipping the hint: brは改行の自己閉じタグです。

Troubleshooting

Q: Preview does not change after Run A: Ensure you edited the HTML pane and clicked Run. Q: Looks correct but check fails A: Auto-check looks for output containing: <br, 1行目, 2行目. Look for typos, full-width spaces, or unclosed tags. Q: Console shows errors A: Open DevTools Console and fix bracket/quote mismatches at the reported line. Q: Hard to type on mobile A: Use landscape mode or continue on desktop—the same URL keeps progress in localStorage.

Interview / portfolio tips

・Explain the techniques in "Html Br" in your own words within 30 seconds ・Practice walking through each line of the sample solution on a whiteboard ・Be ready to discuss tags: p, br ・Mention responsive or accessibility trade-offs ・Prepare one alternative approach and why you chose this one

What to do after you pass

Move to the next exercise in the html-basic track, then continue the learning roadmap at /en/learning/html-basic/.

Keywords

Free hands-on exercise covering 改行, html-basic, 入門, p, br, html br—search-friendly guide for Html Br.

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■ Exercise task

「1行目」と「2行目」をbrタグで改行してください。

Hint if stuck

brは改行の自己閉じタグです。

5pt

改行

1行目と2行目をbrタグで改行してください。

エラーをクリックで該当行をハイライト。✕=エラー ⚠=警告 ›=ログ。

Roadmap · All guides

Deep dive

"Html Br" is a 入門-level HTML exercise. 「1行目」と「2行目」をbrタグで改行してください。 Run it in-browser with automatic checking.

brは改行を挿入します。段落を分けたいときはpタグを複数使う方が一般的です。 Similar patterns appear daily in code review and production UI work.

Pair this with the html-basic roadmap. Exercise #14 reinforces core html-basic skills.

Step-by-step workflow

  1. Read the guide and understand the goal of "Html Br"
  2. Review the HTML editor pane and start from the starter code
  3. Open hints if stuck; compare your diff with the sample solution
  4. Click Run and inspect preview/console output
  5. Auto-check looks for output containing: <br, 1行目, 2行目.
  6. After success, continue with adjacent exercises in the same category

How to read the sample solution

The solution uses HTML tags such as p, br. Check nesting and closing tags. Explanation: brは改行を挿入します。段落を分けたいときはpタグを複数使う方が一般的です。 Hint recap: brは改行の自己閉じタグです。

Real-world & career relevance

HTML underpins blogs, e-commerce copy, and corporate sites. Heading hierarchy and semantic markup indirectly support SEO.

Common mistakes

  • Skipping the hint: brは改行の自己閉じタグです。
  • Multiple h1 on one page
  • Forgetting closing tags like </p>
  • Non-li children directly under ul
  • Omitting img alt text

Troubleshooting

Preview does not change after Run
Ensure you edited the HTML pane and clicked Run.
Looks correct but check fails
Auto-check looks for output containing: <br, 1行目, 2行目. Look for typos, full-width spaces, or unclosed tags.
Console shows errors
Open DevTools Console and fix bracket/quote mismatches at the reported line.
Hard to type on mobile
Use landscape mode or continue on desktop—the same URL keeps progress in localStorage.

Interview & portfolio tips

  • Explain the techniques in "Html Br" in your own words within 30 seconds
  • Practice walking through each line of the sample solution on a whiteboard
  • Be ready to discuss tags: p, br
  • Mention responsive or accessibility trade-offs
  • Prepare one alternative approach and why you chose this one

Glossary

h1
Top-level heading—one per page recommended.
p
Paragraph element.
a
Anchor with href for links.

Keywords covered on this page

Free hands-on exercise covering 改行, html-basic, 入門, p, br, html br—search-friendly guide for Html Br.

Related dev tools

Learning roadmap

Learning roadmap →

Related exercises

Frequently asked questions

Is "改行" free?

This exercise is free and runs entirely in your browser. No account or credit card required.

Difficulty and time?

"改行" is level "入門". Read the guide first; beginners can usually finish within 30 minutes. Allow 5–15 minutes per exercise. Use hints, then the solution if stuck.

What after a correct answer?

After a correct answer, use "Next exercise". When you finish a category, continue on the learning roadmap.

Works on mobile?

Works on mobile browsers, but typing code is easier on a desktop.

Where are other exercises?

All exercises: /en/learn/ with category filters.

Key takeaway for "改行"?

brは改行を挿入します。段落を分けたいときはpタグを複数使う方が一般的です。 Hint: brは改行の自己閉じタグです。

Where does html-basic fit?

HTML underpins blogs, e-commerce copy, and corporate sites. Heading hierarchy and semantic markup indirectly support SEO.

Step-by-step for "Html Br"?

1. Read the guide and understand the goal of "Html Br"
2. Review the HTML editor pane and start from the starter code
3. Open hints if stuck; compare your diff with the sample solution
4. Click Run and inspect preview/console output
5. Auto-check looks for output containing: 6. After success, continue with adjacent exercises in the same category

How to read the sample solution?

The solution uses HTML tags such as p, br. Check nesting and closing tags.

Explanation: brは改行を挿入します。段落を分けたいときはpタグを複数使う方が一般的です。

Hint recap: brは改行の自己閉じタグです。

Something is not working?

Preview does not change after Run → Ensure you edited the HTML pane and clicked Run.
Looks correct but check fails → Auto-check looks for output containing: Console shows errors → Open DevTools Console and fix bracket/quote mismatches at the reported line.
Hard to type on mobile → Use landscape mode or continue on desktop—the same URL keeps progress in localStorage.

Career / interview angle?

Explain the techniques in "Html Br" in your own words within 30 seconds Practice walking through each line of the sample solution on a whiteboard Be ready to discuss tags: p, br Mention responsive or accessibility trade-offs Prepare one alternative approach and why you chose this one

Can I change the starter code?

Yes—if it works. Understanding the starter first, then adding minimal diffs, speeds up learning.

What do the points mean?

5pt is a difficulty hint, not a score you must maximize.