Usage of #If 0

[Ian Bayly]

A very simple answer I'm sure, but I see in various code samples:

#If 0
...
#End If

I understand what the Help tells me re #If but I cannot understand what the above usage does.
What am I missing please?

Ian B

[William Burns]

Basically it is a way to exclude compiling a section of code. Because "#IF 0" can never equal true, so it will always be excluded.

You could do the same thing by rem'ing out each line too, but the #IF 0 takes less typing to block out a section of code.

Bottom line is you can ignore code inside the #IF 0/#END IF section since the compiler will ignore it.

[Ian Bayly]

Thanks William.

Wow1 - how fast was that - 4mins from question to answer!!

Ian B

[Knuth Konrad]

Yes, you can abuse #If 0/#End If as an otherwise in BASIC missing block comment function. Paul Squire's Jellyfish will even display such a block as a comment.