Math.Log10 Method
.NET Framework 4.5
Returns the base 10 logarithm of a specified number.
Namespace: System
Assembly: mscorlib (in mscorlib.dll)
Parameters
- d
- Type: System.Double
A number whose logarithm is to be found.
Return Value
Type: System.DoubleOne of the values in the following table.
d parameter | Return value |
|---|---|
Positive | The base 10 log of d; that is, log 10 d. |
Zero | |
Negative | |
Equal to NaN | |
Equal to PositiveInfinity |
The following example uses the Log10 method to return the base 10 logarithm for selected values.
using System; public class Example { public static void Main() { double[] numbers = {-1, 0, .105, .5, .798, 1, 4, 6.9, 10, 50, 100, 500, 1000, Double.MaxValue}; foreach (double number in numbers) Console.WriteLine("The base 10 log of {0} is {1}.", number, Math.Log10(number)); } } // The example dislays the following output: // The base 10 log of -1 is NaN. // The base 10 log of 0 is -Infinity. // The base 10 log of 0.105 is -0.978810700930062. // The base 10 log of 0.5 is -0.301029995663981. // The base 10 log of 0.798 is -0.0979971086492706. // The base 10 log of 1 is 0. // The base 10 log of 4 is 0.602059991327962. // The base 10 log of 6.9 is 0.838849090737255. // The base 10 log of 10 is 1. // The base 10 log of 50 is 1.69897000433602. // The base 10 log of 100 is 2. // The base 10 log of 500 is 2.69897000433602. // The base 10 log of 1000 is 3. // The base 10 log of 1.79769313486232E+308 is 308.254715559917.
Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
