Why does 1.0f + 0.0000000171785715f return 1f?

Question

An hour later, trying to find an error in my code, I finally found the reason. I tried to add a very small float in 1f, but nothing happened. When trying to figure out why I found that adding a small float to 0f works fine.

Why is this happening? Is this related to "order of magnitude"? Is there any workaround?

Thanks in advance.

Edit:

Switching to double precision or decimal is not currently an option.

Answer 1

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Answer 2

Answer 3

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Answer 4

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Answer 5

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http://msdn.microsoft.com/en-us/library/ayazw934.aspx

Answer 6

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Answer 7

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Answer 8

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