Why is modulus operator not working for double in c#?

by

Because of its storage format, doubles cannot store every values exactly as is is entered or displayed. The human representation of numbers is usually in decimal format, while doubles are based on the dual system.

In a double, 120 is stored precisely because it’s an integer value. But 0.05 is not. The double is approximated to the closest number to 0.05 it can represent. 0.5 is a power of 2 (1/2), so it can be stored precisely and you don’t get a rounding error.

To have all numbers exactly the same way you enter / display it in the decimal system, use decimal instead.

decimal x, y;
x = 120.0M;
y = 0.05M;

decimal z = x % y;  // z is 0

More Related Contents:

  1. Return array from function.
  2. Check if the two Files exist in the folder
  3. Reading/writing an INI file
  4. Calculate MD5 checksum for a file
  5. Getting ServiceStack to retain type information
  6. Detect Windows version in .NET
  7. Difference between ref and out parameters in .NET [duplicate]
  8. Why does Boolean.ToString output “True” and not “true”
  9. Converting BitmapImage to Bitmap and vice versa
  10. ‘using’ statement vs ‘try finally’
  11. Implicit typing; why just local variables?
  12. C# optional parameters on overridden methods
  13. How to change symbol for decimal point in double.ToString()?
  14. How to find the 3rd Friday in a month with C#?
  15. If strings are immutable in .NET, then why does Substring take O(n) time?
  16. string.ToLower() and string.ToLowerInvariant()
  17. Can you compile C# so it doesn’t need the .NET Framework at runtime?
  18. The call stack does not say “where you came from”, but “where you are going next”?
  19. How to send email to multiple address using System.Net.Mail
  20. How to split csv whose columns may contain comma
  21. Populate TreeView with file system directory structure
  22. How can I data bind a list of strings to a ListBox in WPF/WP7?
  23. Why appending AutoFilter corrupts my excel file in this example?
  24. How to unit test if my object is really serializable?
  25. How can I protect my private funcs against reflection executing?
  26. Could not load file or assembly ‘System.Net.Http.Formatting’ or one of its dependencies. The system cannot find the path specified
  27. How to deploy a Metro App to the Desktop?
  28. How to determine the size of a string given a font
  29. Why does ServerVariable[“REMOTE_ADDR”] returns the server IP?
  30. Can we consume a Blazor component as a Web Component within a regular non-Blazor HTML page?

Leave a Comment