dart_control_flow_statements.dart

dart_control_flow_statements.dart

void main() {
  
  // *******
  // Conditional statement
  // *******
  
  
  // example: value mapping
  // '1' = 'yes'
  // '0' = 'no'
  // in other case = 'undefined'

  String value = '1';

  // Conditional expressions (ternary operator)
  String result = value == '1' ? 'yes' : (value == '0' ? 'no' : 'undefined');
  print(result);

  
  // if-else
  if (value == '1') {
    result = 'yes';
  } else if (value == '0') {
    result = 'no';
  } else {
    result = 'undefined';
  }
  print(result);

  
  // Switch-case works with: int, String, enum
  switch (value) {
    case '1':
      result = 'yes';
      break;
    case '0':
      result = 'no';
      break;
    default:
      result = 'undefined';
  }
  print(result);
  
  
  // *******
  // Loops 
  // *******
  
  // Infinite loops
  // for(;;) { }
  // while (true) { }
  // do {} while (true);

  var list = [1, 2, 3, 4];
  
  print(''); // new line
  
  
  // for
  for (var i = 0; i < list.length; i++) {
    if (list[i] == 1) {
      continue; // skips current iteration
    }
    if (list[i] == 4) {
      break; // exit from the loop
    }
    print(list[i]);
  }
  
  print(''); // new line
  
  int i = 6;
  
  
  // while 
  while (i < 10) { i++; }

  int e = 8;
  
  
  // do-while
  do { e++; } while (e < 10);

  
  // for-in
  for (var s in list) {
    // print(s);
  }

  
  // for-each
  list.forEach((e) =>  print(e));
  
  // continue и break statements also works with: while, do-while and for-in
}