Revision as of 09:25, 21 July 2020

Knowledge Base

DO LOOP and EXIT WHILE Not Supported in Macintosh QuickBASIC

Article ID: 35660

Article Last Modified on 11/21/2006

This article was previously published under Q35660

This article describes two corrections to the "Microsoft QuickBASIC for Apple Macintosh: BASIC Language Reference" manual, Pages 154-155.

The example for the IF ... THEN ... ELSE statement on Page 154 incorrectly contains a DO ... LOOP, which is not supported in QuickBASIC for the Macintosh (or in previous versions of BASIC for the Macintosh). EXIT DO also is not supported. The example program gives a "Syntax Error" for the unsupported statements.

You can substitute a WHILE ... WEND statement for the DO ... LOOP statement, as follows:
```
   X=-1
   WHILE X<=0 OR X >= 10000
   INPUT "Enter a number greater than 0 and less than 10,000:",X
   IF X<=0 OR X >= 10000 THEN PRINT "Out of range."
   WEND
                        
```
The example on Page 155 mistakenly uses an EXIT WHILE statement, which is not supported. This program gives a "Syntax Error" on the EXIT WHILE statement.

Additional query words: MQuickB

Keywords: KB35660

@@ Line 41: / Line 41: @@
 You can substitute a WHILE ... WEND statement for the DO ... LOOP statement, as follows:</p>
 <pre class="codesample">   X=-1
-    WHILE X&lt;=0 OR X &gt;= 10000
+    WHILE X<=0 OR X &gt;= 10000
     INPUT &quot;Enter a number greater than 0 and less than 10,000:&quot;,X
-    IF X&lt;=0 OR X &gt;= 10000 THEN PRINT &quot;Out of range.&quot;
+    IF X<=0 OR X &gt;= 10000 THEN PRINT &quot;Out of range.&quot;
     WEND
                          </pre></li>