Java Illuminated, 5th Edition

3.13 The Math Class

The Math class is also part of the java.lang package. As such, it is automatically available to any Java program; we do not need to use the import statement. The Math class provides two static constants (E and PI), as well as a number of static methods that save the programmer from writing some complex mathematical code.

The two constants, E and PI, are both doubles and represent, respectively, e (the base of the natural logarithm, i.e., log e = 1) and pi, the ratio of the circumference of a circle to its diameter. Approximate values of e and pi, as we know them, are 2.78 and 3.14, respectively. These constants are shown in Table 3.12.

TABLE 3.12 Static Constants of the Math Class

Constant	Value
E	e