logarithm

static double log(double a)

Returns the natural logarithm (base e) of a double value.

static double log10(double a)

Returns the base 10 logarithm of a double value.

static double log1p(double x)

Returns the natural logarithm of the sum of the argument and 1.

public class Main {
  public static void main(String[] args) throws Exception {
    System.out.println(Math.log(2));
  }

}

The output:

0.6931471805599453

1. Math class
2. Constant E and PI
3. Get the absolute value
4. sin, cos, tan: Trigonometric functions
5. Cube root and square root
6. Ceilling and flooring value
7. Copy sign
8. Raise the power
9. Get exponent
10. sqrt(x2 +y2)
11. IEEE remainder
12. logarithm
13. Max, min value
14. Next value
15. Math Random
16. Round to int to double
17. Round a value to integer
18. value * 2^ scaleFactor
19. Get the sign
20. Degree to Radian, and Radian to Degree
21. Returns the size of an ulp of the argument