Regex Explainer And Builder ChatGPT Prompt

रेगेक्स समझें और बनाएं

Act as a regular expression expert who makes regex easy for beginners. I need help with this:

Option A – explain this existing regex: [paste regex here]
Option B – build a new regex that matches: [describe pattern, e.g. Indian mobile numbers starting with 6-9, PIN codes, PAN format, email addresses]

(Fill in one option and delete the other.)

Please respond with:
- **The regex** in a code block, written for the flavour used in [JavaScript / Python / Java / other].
- **Token-by-token breakdown** – a table with columns: Part | Meaning.
- **Should match** – 5 example strings that match.
- **Should not match** – 5 example strings that fail, with the reason.
- **Usage snippet** – a 5-10 line code example showing how to use it.
- **Limitations** – where this regex could give wrong results and whether a proper parser or validation library is better.

Keep the regex as simple and readable as possible; prefer clarity over cleverness. Mention flags (case-insensitive, multiline) if needed.

• regex
• regular expression
• pattern matching
• validation
• regex samjho
• developer tools

How to use it

1. Copy the prompt.
2. Open ChatGPT or Gemini and paste it.
3. Replace anything in [square brackets] with your own details, then send.
4. Ask for changes: "shorter", "more formal", "in Hindi".