# MathF.Log10() Method in C# with Examples

• Last Updated : 04 Apr, 2019

In C#, MathF.Log10(Single) is a MathF class method. It is used to return the base 10 logarithm of a specified number.

Syntax: public static float Log10 (float x);
Here, x is the specified number whose logarithm to be calculated and its type is System.Single.

Return Value: It returns the logarithm of val(base 10 log of val) and its type is System.Single.

Note: Parameter x is always specified as a base 10 number. The return value is depend on the argument passed. Below are some cases:

• If the argument is positive then method will return the natural logarithm or log10(val).
• If the argument is zero, then the result is NegativeInfinity.
• If the argument is Negative(less than zero) or equal to NaN, then the result is NaN.
• If the argument is PositiveInfinity, then the result is PositiveInfinity.
• If the argument is NegativeInfinity, then the result is NaN.

Example:

 `// C# program to demonstrate working``// of MathF.Log10(Single) method``using` `System;`` ` `class` `Geeks {`` ` `    ``// Main Method``    ``public` `static` `void` `Main(String[] args)``    ``{`` ` `        ``// float values whose logarithm``        ``// to be calculated``        ``float` `a = 9.887f;``        ``float` `b = 0f;``        ``float` `c = -4.45f;``        ``float` `nan = Single.NaN;``        ``float` `positiveInfinity = Single.PositiveInfinity;``        ``float` `negativeInfinity = Single.NegativeInfinity;`` ` `        ``// Input is positive number so output``        ``// will be logarithm of number``        ``Console.WriteLine(MathF.Log10(a));`` ` `        ``// positive zero as argument, so output``        ``// will be -Infinity``        ``Console.WriteLine(MathF.Log10(b));`` ` `        ``// Input is negative number so output``        ``// will be NaN``        ``Console.WriteLine(MathF.Log10(c));`` ` `        ``// Input is NaN so output``        ``// will be NaN``        ``Console.WriteLine(MathF.Log10(nan));`` ` `        ``// Input is PositiveInfinity so output``        ``// will be Infinity``        ``Console.WriteLine(MathF.Log10(positiveInfinity));`` ` `        ``// Input is NegativeInfinity so output``        ``// will be NaN``        ``Console.WriteLine(MathF.Log10(negativeInfinity));``    ``}``}`

Output:

```0.9950646
-Infinity
NaN
NaN
Infinity
NaN
```

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