Rounding down to 2 decimal places in c#

by

The Math.Round(...) function has an Enum to tell it what rounding strategy to use. Unfortunately the two defined won’t exactly fit your situation.

The two Midpoint Rounding modes are:

  1. AwayFromZero – When a number is halfway between two others, it is rounded toward the nearest number that is away from zero. (Aka, round up)
  2. ToEven – When a number is halfway between two others, it is rounded toward the nearest even number. (Will Favor .16 over .17, and .18 over .17)

What you want to use is Floor with some multiplication.

var output = Math.Floor((41.75 * 0.1) * 100) / 100;

The output variable should have 4.17 in it now.

In fact you can also write a function to take a variable length as well:

public decimal RoundDown(decimal i, double decimalPlaces)
{
   var power = Convert.ToDecimal(Math.Pow(10, decimalPlaces));
   return Math.Floor(i * power) / power;
}

More Related Contents:

  1. How do you round a number to two decimal places in C#?
  2. Round a decimal to the nearest quarter in C#
  3. How to round decimal value up to nearest 0.05 value?
  4. Double vs Decimal Rounding in C#
  5. Allow only decimal numbers in textbox in C#
  6. Math.Round doesn’t behave like i want it to. (X.0xxxxx numbers) [closed]
  7. Remove trailing zeros
  8. When should I use double instead of decimal?
  9. Decimal precision and scale in EF Code First
  10. How To Represent 0.1 In Floating Point Arithmetic And Decimal
  11. How can I round up the time to the nearest X minutes?
  12. Formatting a float to 2 decimal places
  13. Round a double to x significant figures
  14. Why can’t I unbox an int as a decimal?
  15. Find number of decimal places in decimal value regardless of culture
  16. Best way to display decimal without trailing zeroes
  17. Problem parsing currency text to decimal type
  18. Format decimal for percentage values?
  19. Generating a Random Decimal in C#
  20. Rounding integers to nearest multiple of 10 [duplicate]
  21. String to decimal conversion: dot separation instead of comma
  22. Conversion of a decimal to double number in C# results in a difference
  23. Performing Math operations on decimal datatype in C#?
  24. Culture invariant Decimal.TryParse()
  25. Why c# decimals can’t be initialized without the M suffix?
  26. Why does a C# System.Decimal remember trailing zeros?
  27. Why am I getting a compile error when multiplying a decimal by a literal value?
  28. How can I format decimal property to currency?
  29. C# Check if a decimal has more than 3 decimal places?
  30. How do I convert a decimal to an int in C#?

Leave a Comment