Mom can we have Scratch? We have scratch at home. Scratch at home:
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Huh, I had never considered this solution to fizzbuzz to be honest. I usually go for string concatenation, or (i % 3 == 0 && i % 5 == 0), but yeah i % 15 == 0 is certainly a clever simplification
I think it's worse at conveying the intention and should be a compile-time simplification (I'm too lazy to check if compilers would do it though).