Java Math.log10() method

The java.lang.Math.log10() is used to find out the Logarithmic of a number when the base is 10. This method returns the base 10 logarithm of a double value.

Syntax

Parameter

Return

If the argument is Positive value, this method will return the logarithm of a given value.
If the argument is equal to 10ⁿ for integer n, this method will return n.
If the argument is Negative value, this method will return NaN.
If the argument is NaN, this method will return NaN.
If the argument is Positive Infinity, this method will return Positive Infinity.
If the argument is positive or negative Zero, this method will return Negative Infinity.

Example 1

public class Log10Example1
{
    public static void main(String[] args) 
    {
        double x = 38.9;
        // Input positive double, output logarithm of x  
        System.out.println(Math.log10(x));
    }
}

Test it Now

Output:

1.5899496013257077

Example 2

public class Log10Example2
{
    public static void main(String[] args) 
    {
        double x = 100000;
         // A power of 10 as input
        System.out.println(Math.log10(x));
    }
}

Test it Now

Output:

5.0

Example 3

public class Log10Example3
{
    public static void main(String[] args) 
    {
        double x = 1.0/0;
        // Input positive infinity, output Infinity
        System.out.println(Math.log10(x));
    }
}

Test it Now

Output:

Infinity

Example 4

public class Log10Example4
{
    public static void main(String[] args) 
    {
        double x = -45.8;
        // Input negative double, output NaN  
        System.out.println(Math.log10(x));
    }
}

Test it Now

Output:

NaN

Example 5

public class Log10Example5
{
    public static void main(String[] args) 
    {
        double x = 0;
        // Input positive zero, output -Infinity
        System.out.println(Math.log(x));
    }
}

Test it Now

Output: