i'm really curious about this
i mean, everything in pd is numbers and floats
but what the hell is the mysterious bang?
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The bang
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it's an explosive charge
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Bang is the purest entropy source of Pure Data. Check this out!
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A bang is just a simple data type that means "do it". Many objects can do several different things if you give them different messages, but a bang is a simple type that's meant to trigger the main function of the object (unless the main function requires another type). I guess it's not as complicated as other types, so it might have small computational advantages than using floats or symbols.