Editing HAL/S (section)

==Example==

The following is a simple HAL/S program.<ref>{{cite book |last1=Ryer |first1=Michael |title=Programming in HAL/S |date=September 1978 |publisher=NASA |page=2–1 |url=http://www.bitsavers.org/pdf/intermetrics/programming_in_hal-s.pdf}}</ref> Every program begins with a labeled <code>PROGRAM</code> statement; the label consists of an identifier followed by a colon. All variables must be declared in the <code>DECLARE</code> group, which precedes any executable statements. Every program ends with a <code>CLOSE</code> delimiting statement.

<pre>
   SIMPLE: PROGRAM;
C  CODE IN THIS TYPEFACE IS
C  HAL/S SOURCE
   DECLARE PI CONSTANT (3.14159266);
   DECLARE R SCALAR;
   READ(5) R;
   WRITE(6) PI R**2;
   CLOSE SIMPLE;
</pre>