SuperBASIC: Difference between revisions
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(→Ernestos' tips on if, then, else:: Added a hint about parsing error messages) |
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* Watch EMWhite's excellent intro series on YouTube: [https://www.youtube.com/playlist?list=PLeHjTvk7NPiSqGz4REMH-S4hjYpLS2YNR Full Playlist]. | * Watch EMWhite's excellent intro series on YouTube: [https://www.youtube.com/playlist?list=PLeHjTvk7NPiSqGz4REMH-S4hjYpLS2YNR Full Playlist]. | ||
=== An informal list of tips, "gotchas": === | |||
===== | ===== IF, THEN, ELSE ===== | ||
====== Source of this tip: Ernesto ====== | |||
* A regular <code>if then</code> condition can't contain an <code>else</code> statement, as in this example: | * A regular <code>if then</code> condition can't contain an <code>else</code> statement, as in this example: | ||
<code>10 if a=0 then x=10</code> | <code>10 if a=0 then x=10</code> | ||
| Line 25: | Line 27: | ||
40 x=2 <br /> | 40 x=2 <br /> | ||
50 endif</code> | 50 endif</code> | ||
''Debugging hint: If you encounter an error like "open structure" or "endproc without a proc": do not trust the line number that you are given. The root of the problem is probably in a structure earlier on in the code.'' | |||
Revision as of 07:11, 15 March 2024
SuperBASIC is inspired by BBC BASIC but offers quite a bit more.
- SuperBASIC Reference Manual.
- SuperBASIC Memory Map
- Watch EMWhite's excellent intro series on YouTube: Full Playlist.
An informal list of tips, "gotchas":
IF, THEN, ELSE
Source of this tip: Ernesto
- A regular
if thencondition can't contain anelsestatement, as in this example:
10 if a=0 then x=10
- If you need to do an
if then elsestructure, you actually have to do anif else endifstructure like in the following example, skipping thethenstatement.
10 if a=0
20 x=1
30 else
40 x=2
50 endif
- If you do it in one line it needs to have some colons added, making it look weird like this:
10 if a=0:x=1:else:x=2:endif
- if you dare to omit the
endifthinking that theifstatement won't need it, (mmm.., everything is in one line, so no need, right?) -Nope...all hell breaks loose!-
10 if a=0:x=1:else:x=2: REM "<-- Error, omited the endif"
- be careful not to add an extra
thenstatement by mistake to anif else endifstructure, if you do -All hell breaks loose again!!-
10 if a=0 then : rem "<-- Error, THEN is not needed!!!"
20 x=1
30 else
40 x=2
50 endif
Debugging hint: If you encounter an error like "open structure" or "endproc without a proc": do not trust the line number that you are given. The root of the problem is probably in a structure earlier on in the code.
