Floating-point anatomy

About this app

Sign, exponent, mantissa — clickable bit by bit, with the exactly decoded value. The number line shows every representable number as a tick: the gaps double at each power of two. Store 0.1 and see the rounding error — and the demo panel recomputes 0.1 + 0.2 ≠ 0.3 in the mini format.

Subject: Computer science

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