Integer vs Double multiplication gives very strange output

Question

When I am trying to multiply 3 (Integer type) with 112.1 (Double) then the result I get contains many decimal points.

Integer a=3;
Double b=112.1;
 Double result=a*b = 336.29999999999995

But when we multiply 2 (Integer) with 112.1 (Double) then decimal point is so minimal.

Integer a=2;
Double b=112.1;
Double result=a*b = 224.2

Can anybody give me the reason why this strange behavior comes?

[SMBC - Secret Robot Internet](http://www.smbc-comics.com/?id=2999). — Elliott Frisch, Dec 08 '16 at 05:16
find answer here... http://stackoverflow.com/questions/588004/is-floating-point-math-broken — sanjeevprasad, Dec 08 '16 at 05:20

score 0 · Answer 1 · answered Dec 08 '16 at 05:20

0

You can't store actual decimal representation of fractions.

This is because computer use binary to save any value, including fractional values.

Therefore, there is some difference between actually saved one and what you want to store.

answered Dec 08 '16 at 05:20

1 Answers1