I would like to know how to calculate the logarithm of a number in base 2 and on any other basis. I know that in java you can calculate the logarithm of a number in base 10 using the Math.log10 function, but I do not know how to calculate the log of any number in base 2 for example.
Thank you in advance for your attention!
Here's an example:
class Logaritmos {
public static void main(String[] args) {
System.out.println(log(2, 128));
System.out.println(log(5, 625));
System.out.println(log(100, 1000));
System.out.println(log(7, 49));
}
public static double log(double base, double valor) {
return Math.log(valor) / Math.log(base);
}
}
The log method is what you want and feel free to copy and paste into your application. The main method is a test. Here is the correct and expected output:
7.0
4.0
1.4999999999999998
2.0
Just note that this 1.4999999999999998 was meant to be 1.5 , but when working with double there are always precision details.