CODEWITHSUNDEEP
c#typesdouble
Bassel Shawi
Bassel Shawi

Reputation: 614

Set the number of digits after the point in double

In c# double type how can i set the number of digits after the point, i need only 4. thank you.

Upvotes: 6

Views: 17199

Answers (3)

Hans Passant
Hans Passant

Reputation: 941605

Use this to compare two floating point numbers to 4 digits in the fraction:

  if (Math.Abs(a - b) < 1E-4) {
    // close enough
    //...
  }

Upvotes: 2

John Weldon
John Weldon

Reputation: 40759

You can't set the number of digits after the point on the double directly.

You can change the string representation of the double using a format string.

One example would be:

string.Format("{0:0.####}", number);

Or as Jon Skeet points out: 

number.ToString("f4")

Upvotes: 3

Jon Skeet
Jon Skeet

Reputation: 1500785

You can't. Binary floating point doesn't work like that. You can format a double that way (e.g. using "f4" as the format string), but if you're dealing with values which have a natural number of decimal places, then you should probably be using decimal instead. Could you give us more information about what your values represent?

Upvotes: 7

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