title: Send an Email from a SAS program
body: <p>Why does this code still send an email when the condition to link to the email
      send cannot get executed?  SASLOG proves condition vale is zero put x=.</p>
  
  <pre><code>98   filename outbox email 'dan.xxxxx@zz.com';
  99
  100  data _null_;
      /* Set variable */
  101     x=0;  
  102     put x=;
      /* condition cannot be true */
  103     if x=1 then do;  
  104        link send_email;  /* should only be hit if condition is true */
  105     end;
  106  return;
  107
  108  send_email:  /* seems to get executed no matter what */
  109     file outbox
  110     to=("dan.xxxxx@zzcom")
  111     subject="Email test";
  112     put "Email test from SAS program";
  113     put " ";
  114  return;
  115  run;
  
  NOTE: The file OUTBOX is:
        E-Mail Access Device
  
  x=0
  Message sent
        To:          ("dan.xxxxx@zz.com" )
        Cc:
        Bcc:
        Subject:     Email test
        Attachments:
  NOTE: 0 records were written to the file OUTBOX.
  NOTE: DATA statement used (Total process time):
        real time           7.22 seconds
        cpu time            0.35 seconds
  </code></pre>