10 تمارين محلولة على لغة دارت Dart الجزء السادس 2024

void main() {
  double principal = 5000;
  double rate = 0.06 / 12; // معدل الفائدة الشهري
  double monthlyDeposit = 200;
  int months = 3 * 12;

  for (int i = 0; i < months; i++) {
    principal += monthlyDeposit;
    principal += principal * rate;
  }

  print('The amount after 3 years is: \$${principal.toStringAsFixed(2)}');
}

The amount after 3 years is: $13889.96

void main() {
  int countWays(int n, List<int> coins) {
    List<int> dp = List.filled(n + 1, 0);
    dp[0] = 1;

    for (int coin in coins) {
      for (int i = coin; i <= n; i++) {
        dp[i] += dp[i - coin];
      }
    }

    return dp[n];
  }

  int amount = 10;
  List<int> coins = [1, 2, 5];
  print('Number of ways to make \$${amount}: ${countWays(amount, coins)}');
}

Number of ways to make $10: 10

void main() {
  bool isPrime(int n) {
    if (n <= 1) return false;
    for (int i = 2; i <= n ~/ 2; i++) {
      if (n % i == 0) return false;
    }
    return true;
  }

  int sumPrimes(int limit) {
    int sum = 0;
    for (int i = 2; i < limit; i++) {
      if (isPrime(i)) sum += i;
    }
    return sum;
  }

  int limit = 50;
  print('Sum of primes less than $limit: ${sumPrimes(limit)}');
}

Sum of primes less than 50: 328

void main() {
  String text = "Dart is a client optimized language for fast apps on any platform.";
  int wordCount(String text) {
    List<String> words = text.split(' ');
    return words.length;
  }

  print('Number of words: ${wordCount(text)}');
}

Number of words: 12

void main() {
  int dailyWalk = 5; // كم يوميًا
  int goal = 150; // الهدف بالكم

  int daysNeeded = (goal / dailyWalk).ceil();

  print('Days needed to reach the goal: $daysNeeded');
}

Days needed to reach the goal: 30

void main() {
  bool isStrongPassword(String password) {
    bool hasUpperCase = password.contains(RegExp(r'[A-Z]'));
    bool hasLowerCase = password.contains(RegExp(r'[a-z]'));
    bool hasDigit = password.contains(RegExp(r'[0-9]'));
    bool hasSpecialChar = password.contains(RegExp(r'[!@#$%^&*(),.?":{}|<>]'));
    bool hasMinLength = password.length >= 8;

    return hasUpperCase && hasLowerCase && hasDigit && hasSpecialChar && hasMinLength;
  }

  String password = "StrongP@ssw0rd";
  print('Is the password strong? ${isStrongPassword(password)}');
}

Is the password strong? true

void main() {
  List<int> numbers = [5, 3, 8, 1, 4, 6, 2, 7];

  double mean(List<int> nums) {
    return nums.reduce((a, b) => a + b) / nums.length;
  }

  double median(List<int> nums) {
    nums.sort();
    int n = nums.length;
    if (n % 2 == 1) {
      return nums[n ~/ 2].toDouble();
    } else {
      return (nums[n ~/ 2 - 1] + nums[n ~/ 2]) / 2.0;
    }
  }

  print('Mean: ${mean(numbers)}');
  print('Median: ${median(numbers)}');
}

Mean: 4.5
Median: 4.5

void main() {
  List<int> numbers = [12, 45, 33, 10, 5, 8, 19, 22];

  int sumEven(List<int> nums) {
    return nums.where((n) => n % 2 == 0).reduce((a, b) => a + b);
  }

  int sumOdd(List<int> nums) {
    return nums.where((n) => n % 2 != 0).reduce((a, b) => a + b);
  }

  print('Sum of even numbers: ${sumEven(numbers)}');
  print('Sum of odd numbers: ${sumOdd(numbers)}');
}

Sum of even numbers: 52
Sum of odd numbers: 102

void main() {
  List<int> numbers = [2, 4, 6, 8, 10];

  List<int> doubleNumbers(List<int> nums) {
    return nums.map((n) => n * 2).toList();
  }

  print('Doubled numbers: ${doubleNumbers(numbers)}');
}

Doubled numbers: [4, 8, 12, 16, 20]

void main() {
  int factorial(int n) {
    return n == 0 ? 1 : n * factorial(n - 1);
  }

  int combinations(int n, int k) {
    return factorial(n) ~/ (factorial(k) * factorial(n - k));
  }

  int n = 5;
  int k = 3;

  print('Number of combinations: ${combinations(n, k)}');
}

Number of combinations: 10