In C#, Math.Log10() is a Math class method. It is used to return the base 10 logarithm of a specified number.
Syntax:
public static double Log10(double val)
Parameter:
val: It is the specified number whose logarithm to be calculated and its type is System.Double.
Return Value: It returns the logarithm of val(base 10 log of val) and its type is System.Double.
Note: Parameter val 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 Math.Log10(Double) method using System;
class Geeks {
// Main Method
public static void Main(String[] args)
{
// double values whose logarithm
// to be calculated
double a = 4.55;
double b = 0;
double c = -2.45;
double nan = Double.NaN;
double positiveInfinity = Double.PositiveInfinity;
double negativeInfinity = Double.NegativeInfinity;
// Input is positive number so output
// will be logarithm of number
Console.WriteLine(Math.Log10(a));
// positive zero as argument, so output
// will be -Infinity
Console.WriteLine(Math.Log10(b));
// Input is negative number so output
// will be NaN
Console.WriteLine(Math.Log10(c));
// Input is NaN so output
// will be NaN
Console.WriteLine(Math.Log10(nan));
// Input is PositiveInfinity so output
// will be Infinity
Console.WriteLine(Math.Log10(positiveInfinity));
// Input is NegativeInfinity so output
// will be NaN
Console.WriteLine(Math.Log10(negativeInfinity));
}
} |
Output:
0.658011396657112 -Infinity NaN NaN Infinity NaN
Reference: https://msdn.microsoft.com/en-us/library/system.math.log10(v=vs.110).aspx