10 تمارين محلولة على لغة دارت Dart الجزء الأول 2024

import 'dart:io';

void main() {
  dynamic input = stdin.readLineSync();
  var number = int.parse(input);
  var sum = 0;
  for (var i = 0; i <= number; i++) {
    sum += i;
  }
  print('The sum of the consecutive integers from 0 to $number is: $sum');
}

void main() {
  var numbers = [1, 2, 3, 4, 5];
  var sum = 0;
  for (var i = 0; i < numbers.length; i++) {
    sum += numbers[i];
  }
  print('The sum of the list of numbers is: $sum');
}

void main() {
  var numbers = [5, 8, 2, 1, 9, 4];
  var max = numbers[0];
  for (var i = 1; i < numbers.length; i++) {
    if (numbers[i] > max) {
      max = numbers[i];
    }
  }
  print('The maximum number in the list is: $max');
}

void main() {
  var numbers = [5, 8, 2, 1, 9, 4];
  var last = numbers[numbers.length - 1];
  print('The last element in the list is: $last');
}

void main() {
  var numbers = [5, 8, 2, 1, 9, 4];
  var evenCount = 0;
  for (var i = 0; i < numbers.length; i++) {
    if (numbers[i] % 2 == 0) {
      evenCount++;
    }
  }
  print('The number of even numbers in the list is: $evenCount');
}

void main() {
  var str = 'ThisisaString';
  var upperCount = 0, lowerCount = 0;
  for (var i = 0; i < str.length; i++) {
    if (str[i] == str[i].toUpperCase()) {
      upperCount++;
    } else {
      lowerCount++;
    }
  }
  print('Number of uppercase letters: $upperCount');
  print('Number of lowercase letters: $lowerCount');
}

void main() {
  var numbers = [1, 2, 3, 4, 5];
  var sum = 0;
  for (var i = 0; i < numbers.length; i++) {
    sum += numbers[i];
  }
  var average = sum / numbers.length;
  print('The average of the list of numbers is: $average');
}

void main() {
  var numbers = [-1, 2, -3, 4, -5];
  var positiveCount = 0, negativeCount = 0;
  for (var i = 0; i < numbers.length; i++) {
    if (numbers[i] > 0) {
      positiveCount++;
    } else {
      negativeCount++;
    }
  }
  print('The number of positive numbers in the list is: $positiveCount');
  print('The number of negative numbers in the list is: $negativeCount');
}

void main() {
  var numbers = [5, 8, 2, 1, 9, 4];
  var first = numbers[0];
  print('The first element in the list is: $first');
}

void main() {
  var numbers = [5, 8, 2, 1, 9, 4];
  var oddNumbers = [];
  for (var i = 0; i < numbers.length; i++) {
    if (numbers[i] % 2 == 1) {
      oddNumbers.add(numbers[i]);
    }
  }
  print('The odd numbers in the list are: $oddNumbers');
}