Explain code line by line

This prompt explains code for a beginner or intermediate developer. Paste it with the language, and you get what it does in one sentence, a line-by-line explanation of the tricky parts and the flow.

text-explain-code — chatgpt — 46 words

Explain this code to a [BEGINNER / INTERMEDIATE] developer.

Language: [LANGUAGE]
Code: [PASTE CODE]

Give: what it does in one sentence, line-by-line explanation of the tricky parts, the flow of data, edge cases it does not handle and one way to improve it. Use plain words.

Edit in the builder Copy & open ChatGPT ↗Copy & open Gemini ↗Copy & open Claude ↗

Ask "what would break if the input were empty?" for a quick review.

Get a better result

What you will get

A one-sentence summary of what the code does, a line-by-line explanation of the tricky parts, the flow of data, the edge cases it does not handle and one way to improve it, in plain words.

Common mistake

The explanation is pitched too high or too low.

Fix: Choose beginner or intermediate honestly, and say what you already know, for example “I know loops but not recursion”.

Also watch for

It explains every line, including the obvious ones. Stay with the prompt’s “tricky parts” and add “skip imports and simple assignments”.
It misses what the code does not handle. Use the tip and ask “what would break if the input were empty?”, then try other cases such as a very large input.

Try a variation: teach me to write it

Add “then give me a small exercise that asks me to write a similar function myself, and check my answer”. Doing it once teaches more than reading.

Still not right? Reply with this

Here is the exact error I got when I ran it. Explain the cause in one line, then show only the code that needs to change: