How to Use ChatGPT to Write Code (Even as a Beginner)

The short version

ChatGPT is a patient programming tutor that writes code on request. The trick is to go in small steps: ask for one piece, run it, understand it, then ask for the next. Big all-at-once requests give you big, broken programs.

Step by step

1. Describe the goal in plain English: “A script that renames all photos in a folder to their date.”
2. Name the language and where it runs: Python on a Mac, JavaScript on a web page, Excel macros.
3. Ask for the first small step, with an explanation of each line.
4. Run it. If there’s an error, paste the full error message back.
5. Ask for the next step only when the first one works.
6. Ask it to explain anything you don’t understand before you build on it.

Prompts to copy

Start a small project:

I'm a beginner. I want [what the program should do]. I'm on [Windows / Mac] and can use [Python].
Break it into small steps. Give me only step 1: the code, how to run it, and what each line does.

Fix an error:

I ran your code and got this error:
[paste the full error message]
What does it mean, and what's the fix? Explain in simple terms.

Review it:

Review this code for bugs, security problems and anything a beginner might misunderstand:
[paste code]

Example

“Rename all JPG photos in a folder to the date they were taken” becomes: step 1, list the photos; step 2, read each photo’s date; step 3, rename a copy, not the originals; step 4, run it on the whole folder. Each step is short enough to understand and test.

Mistakes to avoid

• Asking for everything at once. You’ll get code you can’t debug.
• Running code on your only copy. Test on copies of files.
• Pasting secrets. Never paste passwords or API keys into a chat; use placeholders.
• Trusting package names blindly. AI sometimes suggests packages that don’t exist. Look them up before installing.

Going further

For serious projects, AI coding assistants that work inside your editor are more capable than a chat window. Start with our guides: set up an AI coding assistant and review AI-written code.

Related: write Excel formulas.