Connecting 5V to the A0 pin

Using Arduino General Electronics
1

Is the A0 pin capable of absorbing the 5V voltage for an extended period of time (24 or even 48 hours) and read the output? Or would this damage the Arduino?

I found information indicating that the A0 pin is designed to withstand this, but there is no data on whether it can handle it for an extended period of time.

2

No it would not damage the Arduino, but just to be safe you should connect a resistor between the 5V source and A0

3

Exactly what is the 5V source?
Which Arduino?

4

It will damage a 3.3V Arduino.

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