Well, this is just a silly example, real code would have things like if(event.code == 1903) // own goal vs const int ownGoal = 1903;...if(event.code == ownGoal) - so no, you don't really need the comment. I also tend to pick the second option, but I can't really explain why - it just feels like a better option...
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I'd go with the second approach, but when needed I'd add a comment explaining concretely why that value is the only correct value.
Well, this is just a silly example, real code would have things like
if(event.code == 1903) // own goalvsconst int ownGoal = 1903;...if(event.code == ownGoal)- so no, you don't really need the comment. I also tend to pick the second option, but I can't really explain why - it just feels like a better option...