Editing Flow diagrams (section)

== 2. Main Program Flow — primesmain ==

<pre class="mermaid">flowchart TD
    START([Start]) --&gt; ACCEPT[ACCEPT commandline-args\nfrom COMMAND-LINE]
    ACCEPT --&gt; MOVEMETHODS[MOVE commandline-args TO methods\nMOVE 'primesmain' TO program-name]
    MOVEMETHODS --&gt; STARTSESS[PERFORM r90-start-session\nCALL primesui start]
    STARTSESS --&gt; UIOK{ui-method-ok?}
    UIOK --&gt;|No| EMERGENCY[DISPLAY emergency message\non console\nSTOP RUN]
    UIOK --&gt;|Yes| LOGUI[LOG 'UI initialisation succeeded.'\nLOG commandline-args]
    LOGUI --&gt; EVAL{EVALUATE commandline-args}
    EVAL --&gt;|report| LOGRPT[LOG 'Primes report generation starts.'\nSET methods = 'report']
    LOGRPT --&gt; CALLGEN[PERFORM r92-generate-primes\nCALL primesgen USING primes-session]
    EVAL --&gt;|generate| LOGGEN[LOG 'Primes generation starts.'\nSET methods = 'generate']
    LOGGEN --&gt; COMMENTED[&quot;⚠ PERFORM r92-generate-primes\n[commented out in source]&quot;]
    EVAL --&gt;|other| LOGBAD[LOG 'Bad parameter'\nCALL primesui stop]
    LOGBAD --&gt; STOPBAD([STOP RUN])
    CALLGEN --&gt; LOGDONE[LOG 'Primes run complete.']
    COMMENTED --&gt; LOGDONE
    LOGDONE --&gt; STOPSESS[PERFORM r99-stop-session\nCALL primesui stop]
    STOPSESS --&gt; STOP([STOP RUN])</pre>

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