ByJakobAT
Hello, I'm currently learning Python and wanted to program a calculator.
However, when I tested it, I sometimes got very accurate results.
Why is that?
(1 votes)
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This is the format in which floating point numbers are usually stored.
This allows a large value range, but only with limited accuracy.
See also:
https://de.wikipedia.org/wiki/IEEE_754
To illustrate the distribution (this is logarithmic):
It is even more important that the accuracy is not homogeneously distributed over the value range.
Jein. This is not important for understanding now, but it is already, yes.
Then you may want to explain what operations (addition/subtraction) tend to reduce the accuracy.
I’ll add a graphic.
Look at you:
https://docs.python.org/3/library/decimal.html
on.
There are good reasons why you don’t use IEEE flats for a calculator in case of doubt.