How to find how many places from left the dot appears in a flot/double?

rempas rempas at tutanota.com
Thu Dec 30 09:03:58 UTC 2021


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?


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