C# finding number of digits of a number

Question

i want to count the digits behind the decimal point. The result i need is eg:

float n = 1,5674; // print There are 4 digits behind the decimal point.

I already got this. But I don't know how to make it work with decimals.

toTest = 1,5674
int i = 0;

do
{
    toTest = toTest / 10;
    i++;
}
while(Math.Abs(toTest) >= 1);

works perfectly fine, to find the lenght of a number >1. But i can't figure out how to count the decimal places.

I'm a trainee, so please don't butcher me if I overseen the right solution.

best regards

It's no problem that you're a trainee. It is a problem that you don't appear to have looked for a solution. I've found three duplicates with a single web search; please [edit] your question to show what you have tried if those don't help you. — CodeCaster, Oct 01 '19 at 11:13

Dmitry Bychenko · Accepted Answer · 2019-10-01T11:54:14.343

0

Instead of dividing, multiply by 10:

  double toTest = 1.5674;

  int i = 0;

  // note "toTest *= 10" instead of original "toTest = toTest / 10"
  for (; toTest - Math.Floor(toTest) != 0; toTest *= 10) 10;
    i += 1;

  Console.Write(i); // 4

edited Oct 01 '19 at 11:54

answered Oct 01 '19 at 11:14

Dmitry Bychenko

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C# finding number of digits of a number

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