Ultrasonic sensor won't work

Projects Programming
1

So I've been trying to program an ultrasonic sensor to read the distance from an object, but for some reason it won't work and keeps reading zero. I thought it was a hardware issue at first, but I've realized that that might not be the case since I've tried using 3 different sensors.
Here is my code:

const int triggerPin = 12; //Trigger connected to PIN 12
const int echoPin = 10; //Echo connected to PIN 10
int buz = 5; //Buzzer to PIN 5
int vibmotor = 3; //vibration motor connected to PIN 3

int inches = 0;

int cm = 0;

long duration;
int distance;
//https://howtomechatronics.com/tutorials/arduino/ultrasonic-sensor-hc-sr04/

void setup() {
pinMode(triggerPin, OUTPUT);
pinMode(echoPin, INPUT);
pinMode(buz, OUTPUT); //makes the buzzer an output
pinMode(2, OUTPUT); //makes the LED an output
pinMode(3, OUTPUT); //makes the vibration motor an output
Serial.begin(9600);
}

void loop()
{
digitalWrite(triggerPin, LOW);
delayMicroseconds(2);

digitalWrite(triggerPin, HIGH);
delayMicroseconds(10);
digitalWrite(triggerPin, LOW);

duration = pulseIn(echoPin, HIGH);
distance = duration*0.01723;
distance = distance/2.54;

Serial.print("Distance:");
Serial.print(distance);
Serial.println(" inches");

if(distance <= 24)
{

//Makes the buzzer buzz
digitalWrite(buz, HIGH);
//Makes the LED flash
digitalWrite(2, HIGH);
//Makes the vibration motor vibrate
digitalWrite(vibmotor, HIGH);
}

else {
digitalWrite(buz, LOW);

digitalWrite(2, LOW);

digitalWrite(vibmotor, LOW);

}

}

Could it be a problem with the code?? If so, what?

2

How many decimal places do you think an int (such as distance) has?

3

it doesn't have any decimal places

4

What happens if you make it a float instead of an int?

5

How do you have the sensor wired? The code is working for me.

The distance calculation can be done with integers only, distance in inches is (duration / 74) / 2 or a bit simpler duration / 148.