Help with Function in BBC Basic Android

[zachnoland]

I tried the function in BASIC but the result I got was the error "No such variable", I don't know where I went wrong I have followed the tutorial on BBCMUG. this is my code:

Code: Select all

   10 DEF LOLSUM(X, Y)
   20 X = X + Y
   30 RETURN X
   40 ENDPROC
   50 PRINT "FUNCTION TEST"
   60 A = 5
   70 B = 5
   80 PRINT "RESULT: "; LOLSUM(A,B)
   90 END

[Richard Russell]

I tried the function in BASIC but the result I got was the error "No such variable", I don't know where I went wrong

That doesn't look anything like BBC BASIC code, it's more similar to Microsoft BASIC or one of the others which are based on it.

I have followed the tutorial on BBCMUG. this is my code:

I'm not familiar with that. The BBC BASIC tutorial is here.

Re-writing your program in BBC BASIC it would look something like this:

Code: Select all

   10 PRINT "FUNCTION TEST"
   20 A = 5
   30 B = 5
   40 PRINT "RESULT: "; FNLOLSUM(A,B)
   50 END
   60 DEF FNLOLSUM(X, Y)
   70 X = X + Y
   80 = X

[zachnoland]

Thank you very much

[zachnoland]

Code: Select all

10 PRINT "FUNCTION TEST"
20 A = 5
30 B = 5
40 PRINT "RESULT: "; FNLOLSUM(A,B)
50 END
60 DEF FNLOLSUM(X, Y)
70 X = X + Y
80 = X

Thank you very much
I thought that functions in BBC BASIC were written as DEF only, but it turns out that DEF and FN are needed.I think I misunderstood what was written in the BBCMUG book.

I'm not familiar with that. The BBC BASIC tutorial is here.

Btw BBCMUG is an abbreviation of (BBC Microcomputer System User Guide) the book was written by John Coll in 1984

[Richard Russell]

Btw BBCMUG is an abbreviation of (BBC Microcomputer System User Guide)

Ah, I've not seen that abbreviation for it used before. BBC BASIC has come a long way since then (everything documented about BASIC in that User Guide should still be valid, but there's a lot more now, mostly added with BBC BASIC V in 1986 or thereabouts).