floating point - Why do I see a double variable initialized to some value like 21.4 as 21.399999618530273? - 


double r = 11.631; double theta = 21.4;

in debugger, these shown 11.631000000000000 , 21.399999618530273.

how can avoid this?

these accuracy problems due internal representation of floating point numbers , there's not can avoid it.

by way, printing these values @ run-time still leads correct results, @ least using modern c++ compilers. operations, isn't of issue.


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