Exceptions in Raku are objects that hold information about errors. An error can be, for example, the unexpected receiving of data or a network connection no longer available, or a missing file. The information that an exception object stores is, for instance, a human-readable message about the error condition, the backtrace of the raising of the error, and so on.| docs.raku.org
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Raku provides strong support for Object Oriented Programming (OOP). Although Raku allows programmers to program in multiple paradigms, Object Oriented Programming is at the heart of the language.| docs.raku.org
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Routines are one of the means Raku has to reuse code. They come in several forms, most notably Methods, which belong in classes and roles and are associated with an object; and functions (also called subroutines or Subs, for short), which can be called independently of objects.| docs.raku.org
Raku provides a rich built-in syntax for defining and using classes. It makes writing classes expressive and short for most cases, but also provides mechanisms to cover the rare corner cases.| docs.raku.org
Definition of a Raku type§| docs.raku.org