C# program to demonstrate the use of Log() method of Math class

Here, we are going to demonstrate the use of Log() method of Math class in C#.Net.
Submitted by Nidhi, on April 24, 2021

Here, we will learn about the Log() method of Math class. This method is used to get the logarithm of a specified number with a given base. This method is overload two times. If we pass a single parameter then it will return the logarithm of the given number using base e. if we pass two parameters then the first parameter is used for number and the second parameter is for the base.


double Math.Log(double number);
double Math.Log(double number, double base);


  • number: The number whose logarithm is to be found.
  • base: The base of the logarithm.

Return value:

It returns the logarithm of a given number.


The source code to demonstrate the use of Log() method of Math class is given below. The given program is compiled and executed successfully.

using System;

class Sample
    //Entry point of Program
    static public void Main()
        double logarithm1 = 0.0;
        double logarithm2 = 0.0;

        //Here we get logarithm of base e for 90. 
        logarithm1 = Math.Log(90);

        //Here we get logarithm of base 10 for 90.
        logarithm2 = Math.Log(90,10);
        Console.WriteLine("Logarithm of Base E:  "+logarithm1);
        Console.WriteLine("Logarithm of Base 10: "+logarithm2);


Logarithm of Base E:  4.49980967033027
Logarithm of Base 10: 1.95424250943932
Press any key to continue . . .

C# Math Class Programs »


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