# 1.11 Math Class

**Suggested Skills:** 2.C, 4.A

**LO 1.11.A** — Develop code to write expressions that incorporate calls to built-in mathematical libraries and determine the value that is produced as a result.

* **1.11.A.1** — The `Math` class is part of the `java.lang` package. Classes in the `java.lang` package are available by default.
* **1.11.A.2** — The `Math` class contains only class methods. The following `Math` class methods are part of the Java Quick Reference:
  * `static int abs(int x)` — returns the absolute value of an `int` value.
  * `static double abs(double x)` — returns the absolute value of a `double` value.
  * `static double pow(double base, double exponent)` — returns the value of the first parameter raised to the power of the second parameter.
  * `static double sqrt(double x)` — returns the nonnegative square root of a `double` value.
  * `static double random()` — returns a `double` value greater than or equal to `0.0` and less than `1.0`.
* **1.11.A.3** — The values returned from `Math.random()` can be manipulated using arithmetic and casting operators to produce a random `int` or `double` in a defined range based on specified criteria. Each endpoint of the range can be inclusive (value is included) or exclusive (value is not included).