𝗧𝗵𝗲 𝗝𝗮𝘃𝗮𝗦𝗰𝗿𝗶𝗽𝘁 𝗕𝘂𝗴 𝗪𝗶𝗶𝘁𝗵 𝗡𝗼 𝗙𝗶𝘅

𝗧𝗵𝗲 𝗝𝗮𝘃𝗮𝗦𝗰𝗿𝗶𝗽𝘁 𝗕𝘂𝗴 𝗪𝗶𝗶𝘁𝗵 𝗡𝗼 𝗙𝗶𝘅

Every JavaScript developer has a bad story.

Try adding 0.1 and 0.2 in JavaScript. You expect 0.3. You get 0.30000000000000004.

JavaScript uses 64-bit floating point values. Binary cannot represent decimals like 0.1 and 0.2 perfectly. The language does its best.

This is not a bug. Many programming languages work this way.

This is risky for:

• Money
• Pricing
• Invoices
• Taxes

Your users do not want to see $19.999999999997.

Avoid decimals for money. Use cents instead.

• Price: 1999 cents
• Tax: 200 cents
• Total: 2199 cents
• Final result: 21.99

Use a decimal library for high precision.

AI agents write code fast. They build functions and APIs. But AI agents use floating point math for payments. Do not approve those pull requests too fast.

Trust the agent. Verify the decimals.

Source: https://dev.to/marrouchi/the-javascript-bug-that-will-never-get-fixed-3618 Optional learning community: https://t.me/GyaanSetuAi