DAY 011: REM

[TerryRitchie]

One of few places the single quote fails is after DATA statements.

This works:

READ a, b, c, d
DATA 1, 2, 3, 4: REM Comment

This will not:

READ a, b, c, d
DATA 1, 2, 3, 4 ' Comment

The above DATA statement throw a syntax error at run-time.

To get around this I always resorted to using line labels for a brief description of multiple DATA lines like so:

    ROW01: DATA 0,0,0,0,3,3,3,3,3,3,3,3,3,3,3,3,0,0,3,3,3,3,3,3,3,3,3,3,3,3,0,0,0,0
    ROW02: DATA 0,0,0,0,3,0,0,0,0,3,0,0,0,0,0,3,0,0,3,0,0,0,0,0,3,0,0,0,0,3,0,0,0,0
    ROW03: DATA 0,0,0,0,5,0,0,0,0,3,0,0,0,0,0,3,0,0,3,0,0,0,0,0,3,0,0,0,0,5,0,0,0,0
    ROW04: DATA 0,0,0,0,3,0,0,0,0,3,0,0,0,0,0,3,0,0,3,0,0,0,0,0,3,0,0,0,0,3,0,0,0,0
    ROW05: DATA 0,0,0,0,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,0,0,0,0
    ROW06: DATA 0,0,0,0,3,0,0,0,0,3,0,0,3,0,0,0,0,0,0,0,0,3,0,0,3,0,0,0,0,3,0,0,0,0
    ROW07: DATA 0,0,0,0,3,0,0,0,0,3,0,0,3,0,0,0,0,0,0,0,0,3,0,0,3,0,0,0,0,3,0,0,0,0
    ROW08: DATA 0,0,0,0,3,3,3,3,3,3,0,0,3,3,3,3,0,0,3,3,3,3,0,0,3,3,3,3,3,3,0,0,0,0
    ROW09: DATA 0,0,0,0,0,0,0,0,0,3,0,0,0,0,0,1,0,0,1,0,0,0,0,0,3,0,0,0,0,0,0,0,0,0
    ROW10: DATA 0,0,0,0,0,0,0,0,0,3,0,0,0,0,0,129,0,0,129,0,0,0,0,0,3,0,0,0,0,0,0,0,0,0
    ROW11: DATA 0,0,0,0,0,0,0,0,0,3,0,0,1,1,1,1,1,1,1,1,1,1,0,0,3,0,0,0,0,0,0,0,0,0
    ROW12: DATA 0,0,0,0,0,0,0,0,0,3,0,0,1,0,0,0,0,0,0,0,0,1,0,0,3,0,0,0,0,0,0,0,0,0
    ROW13: DATA 0,0,0,0,0,0,0,0,0,3,0,0,1,0,0,0,0,0,0,0,0,1,0,0,3,0,0,0,0,0,0,0,0,0
    ROW14: DATA 9,9,9,9,9,9,9,9,9,3,1,1,1,0,0,0,0,0,0,0,0,1,1,1,3,9,9,9,9,9,9,9,9,9
    ROW15: DATA 0,0,0,0,0,0,0,0,0,3,0,0,1,0,0,0,0,0,0,0,0,1,0,0,3,0,0,0,0,0,0,0,0,0
    ROW16: DATA 0,0,0,0,0,0,0,0,0,3,0,0,1,0,0,0,0,0,0,0,0,1,0,0,3,0,0,0,0,0,0,0,0,0
    ROW17: DATA 0,0,0,0,0,0,0,0,0,3,0,0,1,1,1,1,1,1,1,1,1,1,0,0,3,0,0,0,0,0,0,0,0,0
    ROW18: DATA 0,0,0,0,0,0,0,0,0,3,0,0,1,0,0,0,0,0,0,0,0,1,0,0,3,0,0,0,0,0,0,0,0,0
    ROW19: DATA 0,0,0,0,0,0,0,0,0,3,0,0,1,0,0,0,0,0,0,0,0,1,0,0,3,0,0,0,0,0,0,0,0,0
    ROW20: DATA 0,0,0,0,3,3,3,3,3,3,3,3,3,3,3,3,0,0,3,3,3,3,3,3,3,3,3,3,3,3,0,0,0,0
    ROW21: DATA 0,0,0,0,3,0,0,0,0,3,0,0,0,0,0,3,0,0,3,0,0,0,0,0,3,0,0,0,0,3,0,0,0,0
    ROW22: DATA 0,0,0,0,3,0,0,0,0,3,0,0,0,0,0,131,0,0,131,0,0,0,0,0,3,0,0,0,0,3,0,0,0,0
    ROW23: DATA 0,0,0,0,5,3,3,0,0,3,3,3,3,3,3,3,1,1,3,3,3,3,3,3,3,0,0,3,3,5,0,0,0,0
    ROW24: DATA 0,0,0,0,0,0,3,0,0,3,0,0,3,0,0,0,0,0,0,0,0,3,0,0,3,0,0,3,0,0,0,0,0,0
    ROW25: DATA 0,0,0,0,0,0,3,0,0,3,0,0,3,0,0,0,0,0,0,0,0,3,0,0,3,0,0,3,0,0,0,0,0,0
    ROW26: DATA 0,0,0,0,3,3,3,3,3,3,0,0,3,3,3,3,0,0,3,3,3,3,0,0,3,3,3,3,3,3,0,0,0,0
    ROW27: DATA 0,0,0,0,3,0,0,0,0,0,0,0,0,0,0,3,0,0,3,0,0,0,0,0,0,0,0,0,0,3,0,0,0,0
    ROW28: DATA 0,0,0,0,3,0,0,0,0,0,0,0,0,0,0,3,0,0,3,0,0,0,0,0,0,0,0,0,0,3,0,0,0,0
    ROW29: DATA 0,0,0,0,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,0,0,0,0


However, after reading your explanation of REM it got me to thinking. I wondered if this would work:

READ a, b, c, d
DATA 1, 2, 3, 4: ' Comment

And it does. I can now fully comment each line of DATA with a more thorough explanation of the values.

Go figure.