These ChatGPT prompts for coding help you write, understand, debug, and improve code. The key to good results is context: include the language, framework, relevant code, error messages, and what you expected to happen. Always review and test generated code before using it.
Part of ChatGPT Prompts. Last updated September 2026. For more, see Coding Prompts.
Coding Prompts
1. Write a Function
Write a [language] function that [does X]. Inputs: [inputs]. Output: [output]. Handle these edge cases: [edge cases]. Include comments and example usage.
2. Explain Code
Explain what this code does, step by step, for someone who knows [language] but not this codebase. Point out anything risky or unclear. [paste code]
3. Debug an Error
I get this error: [error message]. Here is the relevant code: [code]. I expected [expected behavior]. Explain the likely cause and suggest the smallest fix.
4. Refactor
Refactor this code for readability and maintainability without changing its behavior. Explain each change. [paste code]
5. Write Tests
Write unit tests for this function using [test framework], covering normal cases and edge cases. Explain what each test checks. [paste function]
6. SQL Query
Given these tables: [schema], write a SQL query that [goal]. Explain how it works and note any performance concerns.
7. Regular Expression
Write a regular expression that matches [pattern] but not [counter-examples]. Explain each part and give test strings.
8. Code Review
Review this code as a senior engineer. List bugs, security issues, and readability problems in order of severity, with suggested fixes. [paste code]
Tips
- Remove API keys, passwords, and personal data before pasting code.
- Ask for the smallest change rather than a rewrite.
- For whole-project work, use a coding agent. See AI code assistants.
Frequently Asked Questions
Is ChatGPT good at coding?
Yes, for writing, explaining, and debugging code. Review and test everything it produces.
ChatGPT or a coding tool like Cursor?
ChatGPT is great for snippets and explanations; coding agents such as Cursor, Claude Code, or Codex work across whole projects.
Is it safe to paste my code into ChatGPT?
Remove secrets, and use business plans for proprietary code.