Built-in Elementary Math Functions

Elementary math functions for use in methods are available in the Java math library. Some examples:

double a = Math.PI;       // the mathematical constant pi

double b = Math.sin(3*a); // trigonometric sine function

double c = Math.cos(4*a); // trigonometric cosine function

double d = Math.random(); // random number uniformly distributed in [0,1)

double e = Math.exp(2*a); // exponential function

double f = Math.log(1+e); // natural base e logarithm

double g = Math.pow(10,3); // power function

double h = Math.log10(2.5); // base 10 logarithm

double k = Math.sqrt(81.0); // square root

There are several more math functions available in the Java math library. For additional information, see any Java book or online resource.