I want to read voltage level by my Arduino board please help in this regard. I am using this syntax.
volts = analogRead(A3); // read the input pin Serial.println(volts)
//use this syntax and add ; sign at end of each line and try to read voltage level via voltage divider circuit.
volts = analogRead(A3); // read the input pin Serial.println(volts); // debug value
First off you need to convert your signal's units from analog -> voltage. Do this by using the following equation. I've modified your code so you can copy and paste it into your IDE.
float volts = analogRead(A3) * ( 5.0 / 1024.0) ;
Hope this helps! Good luck!