Having trouble with my temp sensor

Using Arduino Programming Questions
#1

So what I'm trying to do is hook up my temperature sensor and using an if/ else statement to control a basic LED light (if the temp goes above 75 turn the light on) but I seem to be having trouble with my coding. Is there a simple mistake I'm making or is it more complex?

int const tempPin = A0;

int const LEDPin = 5;

 int value = analogRead(tempPin);
 
int tempLevel = 0; 
int tempLevel2 = 255;
int constraint = 0;

void setup() 
{
  Serial.begin(9600);
  analogReference(DEFAULT);
  
 pinMode(LEDPin, OUTPUT);
  
  pinMode(9, OUTPUT);
  pinMode(8, OUTPUT);
  
  digitalWrite(8, HIGH);
  
}

void loop(){
{
  int value = analogRead(tempPin);
    value = (5.0*value*100.0)/1024.0;
    
    Serial.println("Temperature: ");
    Serial.println((byte)value);
    
    delay(1000);
}

  if(value > 75){
 analogWrite(LEDPin, tempLevel);
  }
  
  else{
    analogWrite(LEDPin, tempLevel2);
    
  }
}
#2 
int value = analogRead(tempPin);
    value = (5.0*value*100.0)/1024.0;

Your are overflowing the integer.

#3

I tried quite a bit of other options before I came to this one. It does work but I wanted to know if you saw any problems with it?

Most of all I tried fixing that integer overflow with the new equation down below

 void loop() {
    float temperature = 0.0;   // stores the calculated temperature
    int sample;                // counts through ADC samples
    float ten_samples = 0.0;   // stores sum of 10 samples
  
    // take 10 samples from the MCP9700
    for (sample = 0; sample < 10; sample++) {
        // convert A0 value to temperature
        temperature = ((float)analogRead(A0) * 5.0 / 1024.0) - 0.5;
        temperature = temperature / 0.01;
        // sample every 0.1 seconds
        delay(100);
        // sum of all samples
        ten_samples = ten_samples + temperature;
    }
    // get the average value of 10 temperatures
    temperature = ten_samples / 10.0;
    // send temperature out of serial port
    Serial.print(temperature);
    Serial.println(" deg. C");
    ten_samples = 0.0;
    {
      if (temperature > 26){
        digitalWrite(LEDPin, HIGH);
        digitalWrite(LEDPin2, LOW);
      }
      else {
        digitalWrite(LEDPin, LOW);
        digitalWrite(LEDPin2, HIGH);
      }
}
}
#4 
 temperature = ((float)analogRead(A0) * 5.0 / 1024.0) - 0.5;
        temperature = temperature / 0.01;

You are now using floats, and multiplication is faster than division, I would express the temperature this way

temperature = 100*(((float)analogRead(A0) * .004883) - 0.5);

Sampling every 100 ms seems very fast and a bit of overkill to get 10 readings per second. How fast is your temperature changing? But, if its working....

#5