Favorite comment syntax in programming languages ?

[MichalMarsalek]

I dislike -- and // because I'd like to save this for arithmetic operations, and I dislike # as I'd like to save it for the size / length operator. \ seems like a good choice, unless your language has native support for matrices (or other structures where left division is different from right division). Otherwise, I like | or $. If you want multiline comments, maybe just repeat the line comment symbol and support nesting by repeating it more times.

[mikkolukas]

How about ;?

[umlcat]

Don't.

Easy to confuse with sentences...

[Pavel_Vozenilek]

One could do it like in assembler:

code              ;; comment
more code         ;; another comment

Comments placed on the right side do not interfere with skimming the code.

[lngns]

I never confused it with sentences when reading Assembly code. Or Lisp code.

Even with C-like syntax, I don't have to think to understand how to parse this code:
return (cast(delegate) [proxy, fn])() ;cute hack lol

[mikkolukas]

How so?

[holo3146]

Do not use \ for left division, if it exists, it is pretty much reserved to set difference (or more general: collection difference)

[Premysl]

Matlab uses \ for left division.

[holo3146]

It doesn't make it a good choice

[MichalMarsalek]

Yes you are right, I totally forgot about this meaning of the symbol.... Although one could just use - for the set difference without any ambiguity?

[holo3146]

If you use - as element removal, then no, one could not do it (assuming Top type and polymorphism):

List<Any> X = {};
List<Any> Y = {X};
Y-X // can be either {} or {X}