program to demonstrate for loop

void main() {
  for (int i = 0; i < 10; i++) {
    print("John Doe");
  }
}

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program to demonstrate for loop and print numbers from 10 to 1

void main() {
  for (int i = 10; i >= 1; i--) {
    print(i);
  }
}

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program to calculate sum of first 100 natural numbers using for loop

void main(){

  int total = 0;
  int n = 100; // change as per required
  
  for(int i=1; i<=n; i++){
    total = total + i;
  }
  
  print("Total is $total");
  
}

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program to print even numbers from 50 to 100 using for loop

void main(){
  for(int i=50; i<=100; i++){
    if(i%2 == 0){
      print(i);
    }
  } 
}

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program to demonstrate forEach loop

void main(){
  List<String> footballplayers=['Ronaldo','Messi','Neymar','Hazard'];
  footballplayers.forEach( (names)=>print(names));
}

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program to demonstrate for in loop

void main(){
    List<String> footballplayers=['Ronaldo','Messi','Neymar','Hazard'];

  for(String player in footballplayers){
    print(player);
  }
}

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program to print index and value in list using forEach statement

void main(){

List<String> footballplayers=['Ronaldo','Messi','Neymar','Hazard'];

footballplayers.asMap().forEach((index, value) => print("$value index is $index"));

}

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program to print unicode numbers of a string using for loop

void main(){
  
  String name = "John";
     
for(var codePoint in name.runes){
  print("Unicode of ${String.fromCharCode(codePoint)} is $codePoint.");
}
}

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program to demonstrate while loop to print numbers from 1 to 10

void main() {
  int i = 1;
  while (i <= 10) {
    print(i);
    i++;
  }
}

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program to demonstrate while loop to print numbers from 10 to 1

void main() {
  int i = 10;
  while (i >= 1) {
    print(i);
    i--;
  }
}

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program to demonstrate while loop to find sum of first 100 natural numbers

void main(){

  int total = 0;
  int n = 100; // change as per required
  int i =1;

  while(i<=n){
    total = total + i;
    i++;
  }
  
  print("Total is $total");
  
}

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program to print even numbers from 50 to 100 using while loop

void main(){
  int i = 50;
  while(i<=100){
  if(i%2 == 0){
      print(i);
    }
    i++;
  }
}

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program to demonstrate numbers from 1 to 10 using do while loop

void main() {
  int i = 1;
  do {
    print(i);
    i++;
  } while (i <= 10);
}

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program to print numbers from 10 to 1 using do while loop

void main() {
  int i = 10;
  do {
    print(i);
    i--;
  } while (i >= 1);
}

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program to print first 100 natural numbers using do while loop

void main(){

  int total = 0;
  int n = 100;
  int i =1;
  
  do{
  total = total + i;
    i++;
  }while(i<=n);
  
  print("Total is $total");
  
}

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another example of do while loop

void main(){

  int number = 0;
  
  do{
  print("Hello");
  number--;
  }while(number >1);
  
}

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program to demonstrate break statement in for loop

void main() {
  for (int i = 1; i <= 10; i++) {
    if (i == 5) {
      break;
    }
    print(i);
  }
}

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program to demonstrate break statement in while loop

void main() {
 int i =1;
 while(i<=10){
  print(i);
   if (i == 5) {
      break;
    }
    i++;
 }
}

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example of break statement in switch case statement

void main() {
  var noOfMoneth = 5;
  switch (noOfMoneth) {
    case 1:
      print("Selected month is January.");
      break;
    case 2:
      print("Selected month is February.");
      break;
    case 3:
      print("Selected month is march.");
      break;
    case 4:
      print("Selected month is April.");
      break;
    case 5:
      print("Selected month is May.");
      break;
    case 6:
      print("Selected month is June.");
      break;
    case 7:
      print("Selected month is July.");
      break;
    case 8:
      print("Selected month is August.");
      break;
    case 9:
      print("Selected month is September.");
      break;
    case 10:
      print("Selected month is October.");
      break;
    case 11:
      print("Selected month is November.");
      break;
    case 12:
      print("Selected month is December.");
      break;
    default:
      print("Invalid month.");
      break;
  }
}

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program to demonstrate continue statement

void main() {
  for (int i = 1; i <= 10; i++) {
    if (i == 5) {
      continue;
    }
    print(i);
  }
}

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program to demonstrate exception

void main() {   
   int a = 18;   
   int b = 0;   
   int res;    
     
   try {    
      res = a ~/ b;
      print("Result is $res");   
   }    
    // It returns the built-in exception related to the occurring exception  
   catch(ex) {   
      print(ex);   
    }   
} 

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program to demonstrate exceptionand finally clause

void main() {
  int a = 12;
  int b = 0;
  int res;
  try {
    res = a ~/ b;
  } on UnsupportedError {
    print('Cannot divide by zero');
  } catch (ex) {
    print(ex);
  } finally {
    print('Finally block always executed');
  }
}

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