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Re: FP humor [message #57418 is a reply to message #57417]

Thu, 05 August 2021 15:45

mirek
Messages: 14291
Registered: November 2005

Ultimate Member

dolik.rce wrote on Thu, 05 August 2021 15:41

Hi Mirek,

mirek wrote on Thu, 05 August 2021 14:47
....and I was thinking that the lowest possible double is 1e-308...

You made me do some research and learn something new again

To save others the trouble: 1e-308 is smallest normalized value, denormalized values can be around 4.94066e-324. And (not surprisingly) the C++ standard thought about it: https://en.cppreference.com/w/cpp/types/numeric_limits/denor m_min

Best regards,
Honza

Exactly.

But another interesting issue but perhaps not so suprising fact is that if you multiply variable by 0.6 many many times, it eventually reaches the minimal representable value and then stays at it because of rounding rules...

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[Message index]

		FP humor By: mirek on Thu, 05 August 2021 14:47
		Re: FP humor By: dolik.rce on Thu, 05 August 2021 15:41
		Re: FP humor By: mirek on Thu, 05 August 2021 15:45
		Re: FP humor By: mirek on Thu, 19 August 2021 17:39

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