Arduino EROR HELP

[darkmour]

I'm uploading this code to Arduino, interestingly I'm getting random values ​​from analog and digital inputs. There is no problem with Arduino. I tried 3 different Arduinos and they all have the same problem. why is this happening? I am using Arduino 1.8.18

int buton=5;
int buton2=6;
int buton3=A0;

void setup() {
pinMode(buton, INPUT);
pinMode(buton2, INPUT);
pinMode(buton3, INPUT);
Serial.begin(9600);

}

void loop() {
Serial.println(digitalRead(buton));
Serial.println(digitalRead(buton2));
Serial.println(analogRead(buton3));
delay(300);
}

[red_car]

Probably your inputs are floating.

Digital inputs needs to have pull-up or pull-down resistors.

Analog inputs needs to be attached to a voltage: 0 - reference voltage at all times.

Show your circuit.

[b707]

@darkmour

interestingly I'm getting random values ​​from analog and digital inputs.

If nothing connects to your inputs - this behaviour is absolutely normal.

[killzone_kid]

Please post the error

[johnwasser]

@darkmour

pinMode(buton3, INPUT);

Serial.println(analogRead(buton3));

Do not use pinMode() on pins that you are only using for analogRead(). Use pinMode() with digitalRead() or digitalWrite().

[Beminetonight]

Note that you can use
pinMode(buton3, INPUT_PULLUP);

This gives the pin a default high level without the need for an external resistor.