Programming Ruby 3.3

Math

The Numeric class and its subclasses handle a lot of the basic arithmetic in Ruby. (For more see ​Numbers​.) But sometimes you need to do more advanced math. The Math module provides a couple dozen math functions, largely trigonometry, but it also handles other branches of advanced math. The BigMath model recreates a subset of those methods for BigDecimal arguments and values.

All of these methods are module methods, so they are all called with module syntax, as in Math.cos(value).

The Math module contains multitudes, especially if you like trigonometry. Specifically, it contains:

• The constant values Math::Pi and Math::E.

• Math.sqrt(x) and Math.cbrt(x), which return the square and cube roots of the argument, respectively.

• Logarithm functions, ...