how big numbers count down? arduino uno

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1

How big numbers can Arduino count down in a timer-program counting seconds?
I want to count down from 181440 and I can't get it to work
(with the code that works fine for counting down from 100 for example.)
I ask because I want to make sure, this has to do with the Arduino, right?
(And not with the code?)

thanx <3

Here is the code;

//Arduino Self-Timer
   //T.K.Hareendran
   //www.electroschematics.com
   #include <LiquidCrystal.h>
   LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
   int runTimer = 1; 
   int runFor = 10; // time in seconds
   //int buzzerPin = 13;
   //int relayPin=4;
   int data = 0;
    
   void setup() {
     // pinMode(buzzerPin, OUTPUT);
     // pinMode(relayPin,OUTPUT);
      lcd.begin(16, 2);
   }
    
   void loop() {
      if(runTimer == 1){ 
        // digitalWrite(relayPin,LOW); // relay is OFF during countdown
         /* *change to HIGH if you want the relay to be ON while countdowning */
         lcd.clear();
         //lcd.print("TIME LEFT");
         //Start timer
         timer(); 
      } else {
        // digitalWrite(relayPin,HIGH); // relay is ON when time expired
         /* *change to LOW if you want the relay to be OFF when the time expired */
      }
      runTimer = 0;
      lcd.noDisplay();
      delay(250);
      for(int duration = 0; duration < 100; duration ++){
         //digitalWrite(buzzerPin, HIGH);
         //delayMicroseconds(500);
         //digitalWrite(buzzerPin, LOW);
         //delayMicroseconds(500);
      } 
      lcd.display();
      delay(250);
   }
    
   void timer() {
      for(int timer = runFor;timer > 0; --timer){
      if(timer >= 10) {
         lcd.setCursor(6,0); 
      } else {   
         lcd.setCursor(6,0);
         lcd.print("0");
         lcd.setCursor(7,0);
      }
      lcd.print(timer);
      //lcd.print(" SECOND!");
      delay(1000);
      }
      lcd.setCursor(0,0);
      lcd.clear();
      lcd.print("BOOM!");
    delay(500);
    lcd.clear();
    delay(500);
    lcd.setCursor(6,0);
    lcd.print("BOOM!");
  delay(500);
  lcd.clear();
  delay(500);
  lcd.setCursor(10,0);
  lcd.print("BOOM!");
delay(500);
lcd.clear();
delay(500);
 lcd.print("BOOM!");
delay(500);
lcd.clear();
delay(500);
lcd.setCursor(3,0);
lcd.print("I WANT YOU");
delay(500);
lcd.setCursor(3,1);
lcd.print("IN MY WOMB");
delay(500);
   }

Moderator edit:
</mark> <mark>[code]</mark> <mark>

</mark> <mark>[/code]</mark> <mark>
tags added.

2

Please read the instructions first, then choose "modify" on your first post and mark up the "code" as such.

Funny sense of humour, too!

3

Change:

    int runFor = 10; // time in seconds

and:

       for(int timer = runFor;timer > 0; --timer){

to:

    long runFor = 10; // time in seconds

and:

       for(long timer = runFor;timer > 0; --timer){
4

You're trying to store a number larger than the maximum value of an int (which is 16 bit, so -32768 to 32767) in an int datatype.

Use a long, or unsigned long, which are 32 bits, letting you do values from -2.1 to 2.1 billion, or 0 to 4.2 billion, respectively.

5

thanx a lot! that helped so much and made it work perfect! :grinning: 8)
and sorry for not putting the code in right,
I usually don't write much here, only read (lurk) :-[