Chain-of-thought prompting

What is chain-of-thought?

Chain-of-thought (CoT) is a prompting technique where you ask Claude to show its reasoning process — not just the answer. Instead of jumping straight to the conclusion, Claude thinks out loud through the problem step by step.

💡 Simply explained:
Regular prompt → Claude gives you the answer.
Chain-of-thought → Claude shows you the path to the answer.

How to activate chain-of-thought

✅ Magic phrases:
"Think step by step."
"Show your reasoning."
"Go through this systematically."
"Explain each step before concluding."
"Let us think step by step."

When should you use chain-of-thought?

🧮

Math and logic — always. CoT reduces calculation errors dramatically.

⚖️

Decisions and assessments — when you want to see the trade-offs, not just the conclusion.

🐛

Debugging — ask Claude to go through the code or argument line by line.

"Show me how you think, not just what you think." — The essence of chain-of-thought prompting

🎯 Test your knowledge

Test yourself — completely optional, but fun! 🎯

Question 1 of 3

What is the main point of chain-of-thought prompting?

CoT asks Claude to show the reasoning process step by step — not just give the answer. This reduces errors and increases quality.

Question 2 of 3

Which phrase activates chain-of-thought in the simplest possible way?

"Think step by step" is the classic zero-shot CoT phrase — simple and highly effective.

Question 3 of 3

When is chain-of-thought MOST useful?

CoT is especially valuable for math, logic, decisions and debugging — tasks where the reasoning is as important as the answer.