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
Raku highlighting| docs.raku.org
Variables are symbolic names for values or containers. Variable declarations or assignment of values may create a container on the fly. Variable names can start with or without a special character called a sigil, followed optionally by a second special character named twigil and then an identifier.| docs.raku.org
A regular expression is a sequence of characters that defines a certain text pattern, typically one that one wishes to find in some large body of text.| docs.raku.org