C# Math.Truncate() - Syntax & Examples

C MathTruncate Examples

In this tutorial, we will learn about the C# Math.Truncate() method, and learn how to use this method to truncate a given decimal or double value, with the help of examples.

TruncateDecimal

Math.Truncate(d) returns the integral part of a specified decimal number d.

Syntax

The syntax of Truncate() method is

Math.Truncate(Decimal d)

where

Parameter	Description
d	The decimal value which is to be truncated.

Return Value

The method returns decimal value after truncation.

Example 1 Truncate

In this example, we will take some decimal values and use Truncate() method to get the integral part of the respective numbers.

C# Program

using System;
 
class Example {
    static void Main(string[] args) {
        Decimal d, result;

        d = 7.5785M;
        result = Math.Truncate(d);
        Console.WriteLine($"Truncate of {d} is {result}.");

        d = -7.5785M;
        result = Math.Truncate(d);
        Console.WriteLine($"Truncate of {d} is {result}.");

        d = 0.17525M;
        result = Math.Truncate(d);
        Console.WriteLine($"Truncate of {d} is {result}.");
    }
}

Output

Truncate of 7.5785 is 7.
Truncate of -7.5785 is -7.
Truncate of 0.17525 is 0.

TruncateDouble

Math.Truncate(d) returns the integral part of a specified double-precision floating-point number d.

Syntax

The syntax of Truncate() method is

Math.Truncate(Double d)

where

Parameter	Description
d	The double value which is to be truncated.

Return Value

The method returns double value after truncation.

Example 2 Truncate

In this example, we will take some double-precision floating-point numbers and use Truncate() method to get the integral part of the respective numbers.

C# Program

using System;
 
class Example {
    static void Main(string[] args) {
        Double d, result;

        d = 7.5785;
        result = Math.Truncate(d);
        Console.WriteLine($"Truncate of {d} is {result}.");

        d = -7.5785;
        result = Math.Truncate(d);
        Console.WriteLine($"Truncate of {d} is {result}.");

        d = Double.NaN;
        result = Math.Truncate(d);
        Console.WriteLine($"Truncate of {d} is {result}.");

        d = Double.PositiveInfinity;
        result = Math.Truncate(d);
        Console.WriteLine($"Truncate of {d} is {result}.");

        d = Double.NegativeInfinity;
        result = Math.Truncate(d);
        Console.WriteLine($"Truncate of {d} is {result}.");
    }
}

Output

Truncate of 7.5785 is 7.
Truncate of -7.5785 is -7.
Truncate of NaN is NaN.
Truncate of ∞ is ∞.
Truncate of -∞ is -∞.

Conclusion

In this C# Tutorial, we have learnt the syntax of C# Math.Truncate() method, and also learnt how to use this method with the help of examples.