Decimal.Remainder() Method in C#

The Decimal.Remainder() method in C# is used to calculate the remainder after dividing two Decimal values. This method performs the same operation as the modulus operator (%) but is specifically designed for decimal precision calculations.

Syntax

Following is the syntax −

public static decimal Remainder(decimal val1, decimal val2);

Parameters

• val1 − The dividend (the number to be divided).
• val2 − The divisor (the number by which to divide).

Return Value

Returns a decimal value representing the remainder after dividing val1 by val2.

Using Decimal.Remainder() with Different Values

Example 1

using System;

public class Demo {
   public static void Main() {
      decimal val1 = 45.15m;
      decimal val2 = 15.15m;
      Console.WriteLine("Decimal 1 = " + val1);
      Console.WriteLine("Decimal 2 = " + val2);
      Console.WriteLine("After Division = " + (Decimal.Divide(val1, val2)));
      Console.WriteLine("Remainder = " + (Decimal.Remainder(val1, val2)));
   }
}

The output of the above code is −

Decimal 1 = 45.15
Decimal 2 = 15.15
After Division = 2.9801980198019801980198019802
Remainder = 14.85

Example 2

using System;

public class Demo {
   public static void Main() {
      decimal val1 = 1.00m;
      decimal val2 = 1.00m;
      Console.WriteLine("Decimal 1 = " + val1);
      Console.WriteLine("Decimal 2 = " + val2);
      Console.WriteLine("After Division = " + (Decimal.Divide(val1, val2)));
      Console.WriteLine("Remainder = " + (Decimal.Remainder(val1, val2)));
   }
}

The output of the above code is −

Decimal 1 = 1.00
Decimal 2 = 1.00
After Division = 1
Remainder = 0.00

Using Decimal.Remainder() vs Modulus Operator

Example

using System;

public class Demo {
   public static void Main() {
      decimal val1 = 17.5m;
      decimal val2 = 5.2m;
      
      Console.WriteLine("Dividend: " + val1);
      Console.WriteLine("Divisor: " + val2);
      Console.WriteLine("Using Decimal.Remainder(): " + Decimal.Remainder(val1, val2));
      Console.WriteLine("Using % operator: " + (val1 % val2));
      Console.WriteLine("Both results are equal: " + (Decimal.Remainder(val1, val2) == (val1 % val2)));
   }
}

The output of the above code is −

Dividend: 17.5
Divisor: 5.2
Using Decimal.Remainder(): 1.9
Using % operator: 1.9
Both results are equal: True

Comparison

Conclusion

The Decimal.Remainder() method provides a precise way to calculate the remainder of decimal division operations. While it produces the same results as the modulus operator (%), it offers a more explicit method-based approach for remainder calculations with decimal precision.