Let's say that I have the following float/double: 137.837

How can I find how many places from left the dot appears? So in this example I want to take either three or four (depending on how you think it). Does anyone knows how I can do that and can explain it to me?

On Thursday, 30 December 2021 at 09:03:58 UTC, rempas wrote:

See the https://en.wikipedia.org/wiki/Common_logarithm fpr the explanations.

import std.stdio, std.math;

void main(string[] args)
{
    alias numDigits = (f) => log10(f + 0.5).ceil();
}

On Thursday, 30 December 2021 at 11:17:39 UTC, afg45 wrote:

import std.stdio, std.math;

void main(string[] args)
{
    alias numDigits = (f) => log10(f + 0.5).ceil();
}

Thanks a lot! However, I used the "log10" function from "libm" because I will need to not use Phobos anyway