problem with coding circuits

Projects Programming
1

Can anyone help me with my coding on this circuit? I have absolutely no experience on coding.

//header
//define constants and variables
const int sensorPin = A0;
const float baselineTemp = 20.0;

//20 degrees celsius, or room temperature

//setup
void setup(){
//open a serial port
Serial.begin(9600);

//start with pin 2. Add 1 and repeat the loop.
for (int pinNumber = 2; pinNumber < 5; pinNumber++){
pinMode(pinNumber, OUTPUT);
digitalWrite(pinNumber, LOW);
}

//loop void loop(){
int sensorVal = analogRead(sensorPin);

Serial.print("Sensor Value: ");
Serial.print(sensorVal);

//convert the ADC reading to voltage
float voltage = (sensorVal/1024.0)*5.0;
//print new value to serial monitor
Serial.print(", Volts: ");
Serial.print(voltage);

//convert the voltage to temperature in degrees
float temperature = (voltage - .5)*100;
Serial.print(", degrees C: ");
//Serial.print1n(temperature)；

//if temperature is below baseline
if(temperature < baselineTemp){
digitalWrite(2,LOW);
digitalWrite(3,LOW);
digitalWrite(4,LOW);
}
//low temperature <<<<THIS IS WHERE I WAS WRONG 43
else if (temperature >= baselineTemp+2 &&
temperature < baselineTemp+4){
digitalWrite(2, HIGH);
digitalWrite(3, LOW);
digitalWrite(4,LOW);
}
//medium temperature
else if (temperature >= baselineTemp+4 &&
temperature < baselineTemp+6){
digitalWrite(2, HIGH);
digitalWrite(3, HIGH);
digitalWrite(4,LOW);
}

//high temperature
else if(temperature >= baselineTemp+6){
digitalWrite(2, HIGH);
digitalWrite(3, HIGH);
digitalWrite(4, HIGH);
}
delay (1);
}

and the error was:
in function 'main':
43:undefined reference to 'loop'

thx a lot!

2

  1. Each { needs a }

  2. //loop void loop(){

Change to:

//loop

void loop(){