== Why is this an issue?

The requirement for a final ``++when else++`` clause is defensive programming. The clause should either take appropriate action, or contain a suitable comment as to why no action is taken.

=== Noncompliant code example

[source,apex]
----
switch on i { // missing 'when else'
  when 2 {
    System.debug('when block 2');
  }
  when -3 {
    System.debug('when block -3');
  }
}
----

=== Compliant solution

[source,apex]
----
switch on i { 
  when 2 {
    System.debug('when block 2');
  }
  when -3 {
    System.debug('when block -3');
  }
  when else {
    System.debug('default');
  }
}
----

include::../see.adoc[]

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== Implementation Specification
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include::../message.adoc[]

'''
== Comments And Links
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include::../comments-and-links.adoc[]

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