Why 0.1 + 0.2 is not 0.3

Decimal numbers are stored in binary scientific notation. Most of them can only be approximated.

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I have a confession. I'm perfect at whole numbers, as long as they fit in my registers. But ask me for one tenth and I will hand you something very, very close to one tenth, and hope you don't look at the 17th digit. Here is why, and why it isn't a bug.