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+---
+Title: 'Log10()'
+Description: 'Returns the base-10 logarithm of a specified number.'
+Subjects:
+  - 'Computer Science'
+  - 'Web Development'
+Tags:
+  - 'Arithmetic'
+  - 'Functions'
+  - 'Math'
+  - 'Methods'
+CatalogContent:
+  - 'learn-c-sharp'
+  - 'paths/computer-science'
+---
+
+In C#, the **`Math.Log10()`** method returns the base-10 logarithm of a given number. This logarithm represents the power to which 10 must be raised to obtain the input value. The method is defined in the `System` namespace.
+
+## Syntax of C# `Math.Log10()`
+
+```pseudo
+Math.Log10(number);
+```
+
+**Parameters**
+
+- `number`: A `double` value whose base-10 logarithm is computed.
+
+**Return value:**
+
+Returns a `double` that represents the base-10 logarithm of `number`. Behavior for special inputs:
+
+- If the input is a positive number, the method returns its base-10 logarithm.
+- If the input is zero, the method returns `NegativeInfinity`.
+- If the input is a negative number, the method returns `NaN`.
+- If the input is `NaN`, the method returns `NaN`.
+- If the input is `PositiveInfinity`, the method returns `PositiveInfinity`.
+- If the input is `NegativeInfinity`, the method returns NaN.
+
+## Example
+
+The example below demonstrates the return values of `Math.Log10()` for different inputs:
+
+```cs
+using System;
+
+class Geeks {
+  public static void Main(String[] args) {
+    double a = 4.55;
+    double b = 0;
+    double c = -2.45;
+    double nan = Double.NaN;
+    double positiveInfinity = Double.PositiveInfinity;
+    double negativeInfinity = Double.NegativeInfinity;
+
+    Console.WriteLine(Math.Log10(a));
+    Console.WriteLine(Math.Log10(b));
+    Console.WriteLine(Math.Log10(c));
+    Console.WriteLine(Math.Log10(nan));
+    Console.WriteLine(Math.Log10(positiveInfinity));
+    Console.WriteLine(Math.Log10(negativeInfinity));
+  }
+}
+```
+
+The output of the code is:
+
+```shell
+0.658011396657112
+-Infinity
+NaN
+NaN
+Infinity
+NaN
+```
+
+## Codebyte Example
+
+This example calculates the base-10 logarithm of `x` and prints the result:
+
+```codebyte/csharp
+using System;
+
+class Program {
+  static void Main() {
+    double x = 10.0;
+    double result = Math.Log10(x);
+
+    Console.WriteLine($"The base 10 logarithm of {x} is {result}");
+  }
+}
+```