---
title: "Discussion on \"Why Your Computer Can Launch Rockets But Can't Add 0.1 + 0.2\" | Hashnode"
description: "Discussion on \"Why Your Computer Can Launch Rockets But Can't Add 0.1 + 0.2\". Your computer can render entire universes in video games, predict tomorrow's weather, and help billionaires land rockets on floating robot ships. Yet somehow, if you innocently ask it to add 0.1 + 0.2, it looks you dead in the eye and says \"0.3000000..."
url: "https://hashnode.com/posts/why-your-computer-can-launch-rockets-but-cant-add-01-02/6977027d1c5ccfad21f2f3fa"
---

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# [Why Your Computer Can Launch Rockets But Can't Add 0.1 + 0.2](https://mysandbox.hashnode.dev/why-your-computer-can-launch-rockets-but-cant-add-01-02?utm_source=hashnode&utm_medium=feed)

Your computer can render entire universes in video games, predict tomorrow's weather, and help billionaires land rockets on floating robot ships. Yet somehow, if you innocently ask it to add 0.1 + 0.2, it looks you dead in the eye and says "0.3000000...

Jan 26 · 4 min read · mysandbox.hashnode.dev  
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## Written by

[Ashish Bhati](https://hashnode.com/@ashishbhati)

@ashishbhati

  
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