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## Re: Support of log10?

**From**: |
Peng Yu |

**Subject**: |
Re: Support of log10? |

**Date**: |
Thu, 24 Jun 2021 09:01:47 -0500 |

>* Who said you will always get exactly 3 if you have log10?*
Because the number 1000 can be represent in float exactly, and the
answer 3 can be represent in float exactly. Therefore, the correct
result for log10(1000) must be exact 3 in float. Anything that
deviated from it, no matter how small, is not exactly correct.
>* And why are exact powers of 10 even interesting enough to justify yet*
>* another built-in function?*
I can ask the same question. Why it is justified not include it. Given
it is trivial to include it?
>* After all, if you are only interested in*
>* exact powers of 10, you don't need a math function at all, you simply*
>* count the zero digits in the string representation of the number.*
No. 1000 is just an example that has an exact result in float. There
can be other examples that has exact answers in float.
--
Regards,
Peng