== Why is this an issue?

The ``++EVALUATE++`` statement allows implementing case structures in Cobol. Each case is managed by a ``++WHEN++`` phrase activated by specific test of a variable.The ``++WHEN OTHER++`` phrase allows managing all the cases which have not been taken into account by the previous ``++WHEN++`` phrases. If the variable to be tested contains a new value that is not currently managed then the absence of the ``++WHEN OTHER++`` phrase will lead a situation in which no process will be performed for this value and the program may have uncontrolled or undefined behavior.

=== Noncompliant code example

[source,cobol]
----
       A010-PRINCIPAL.
         EVALUATE  Y5FTAR-PER-ECN-CTS 
           WHEN '01'                   
             MOVE 'A' TO WS-CD-PER-CTS
           WHEN '02'  
             MOVE 'S' TO WS-CD-PER-CTS
           WHEN '04'  
             MOVE 'T' TO WS-CD-PER-CTS
           WHEN '12'     
             MOVE 'M' TO WS-CD-PER-CTS
         END-EVALUATE.
----

=== Compliant solution

[source,cobol]
----
       A010-PRINCIPAL.
         EVALUATE  Y5FTAR-PER-ECN-CTS 
           WHEN '01'                   
             MOVE 'A' TO WS-CD-PER-CTS
           WHEN '02'  
             MOVE 'S' TO WS-CD-PER-CTS
           WHEN '04'  
             MOVE 'T' TO WS-CD-PER-CTS
           WHEN '12'     
             MOVE 'M' TO WS-CD-PER-CTS
           WHEN OTHERS
             MOVE 'O' TO WS-CD-PER-CTS
         END-EVALUATE.
----

include::../see.adoc[]

ifdef::env-github,rspecator-view[]

'''
== Implementation Specification
(visible only on this page)

include::../message.adoc[]

'''
== Comments And Links
(visible only on this page)

include::../comments-and-links.adoc[]

endif::env-github,rspecator-view[]