On Thu, 12 Apr 2018 18:41:56 -0700 (PDT), Thomas Lake wrote:   
   >   
   > On Wednesday, April 11, 2018 at 6:33:17 AM UTC-4, Shaun Bebbington wrote:   
   >> Hi,   
   >>   
   >> I found something odd today in the powerful CBM BASIC v2.0.   
   >>   
   >> Having worked with Sinclair BASIC quite a lot recently, I use GOTO X   
   >> where X is a valid line number (i.e., LET X = 100). But I know   
   >> that's not possible with Microsoft BASIC. Of course there is the ON   
   >> X GO TO 100,200 ...   
   >>   
   >> So I thought "I know, I'll try and use a function, could CBM BASIC   
   >> use this as a look up table". The following, I expected to go to the   
   >> value in the function A() which returns 10, but...   
   >>   
   >> 0 DEF FN A(X) = 10   
   >> 1 PRINT FN A(0)   
   >> 2 GO TO FN A(0)   
   >> 3 PRINT "END GRACEFULLY"   
   >> 4 END   
   >> 10 PRINT "STOP"   
   >> 11 STOP   
   >>   
   >> Try it for yourself. What's going on here?   
   >>   
   >> Thanks in advance.   
   >>   
   >> Shaun.   
   >   
   > You SHOULD get a syntax error. Commodore (Microsoft) BASIC is supposed   
   > to only allow numeric constants, not variables after GOTO and   
   > GOSUB.   
      
   Yes. He might solve this with some IF statements.   
      
   > What do you actually see happening?   
      
   I'd wonder if anything else than an error message.   
   --   
   Andreas   
      
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