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→Input Reading
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When the Pin is neither tied to GND, neither to 3.3V, then the pin voltage is said "floating".
{{ambox|text=When the Pin is neither tied to GND, neither to 3.3V, then the pin voltage is said "floating".}}
The logical state of a floating pin is unpredictable, it may be High, it may be Low... we don't know.
The logical state of a floating pin is unpredictable, it may be High, it may be Low... we don't know.