Structured Programming in Basic Problems

© 1998 by Dr. Thomas W. MacFarland -- All Rights Reserved


     Instructions:   Review the following program and see if you can 
                     predict the outcome by completing a "pencil 
                     trace" of the code.  

                     Program output is provided at the end of this 
                     page.

     Compiler:       The program was prepared using GWBasic, which  
                     requires the use of line numbers.


10 REM This program demonstrates a nested loop.
20 FOR X = 2 TO 3
30   FOR Y = 4 TO 5
40     FOR Z = 6 TO 7
50       PRINT X Y Z
60     NEXT Z
70   NEXT Y
80 NEXT X
99 END
10000 REM And the answer is ...
10010 REM  2  4  6
10020 REM  2  4  7
10030 REM  2  5  6
10040 REM  2  5  7
10050 REM  3  4  6
10060 REM  3  4  7
10070 REM  3  5  6
10080 REM  3  5  7

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