Here are some examples of basic Dart programming concepts, including printing, variables, loops, and taking input.

1. Print Statements

 void main() {
   print('Hello, World!');
   print('Welcome to Dart programming.');
 }

2. Variables

  void main() {
   // Declaring variables
   int age = 25;
   double height = 5.9;
   String name = 'Alice';
   bool isStudent = true;
 
   // Printing variables
   print('Name: $name');
   print('Age: $age');
   print('Height: $height');
   print('Is Student: $isStudent');
 }

3. Loops

• For loop:

     void main() {
     for (int i = 0; i < 5; i++) {
       print('For Loop Iteration: $i');
     }
   }

• While loop:

     void main() {
     int i = 0;
     while (i < 5) {
       print('While Loop Iteration: $i');
       i++;
     }
   }

4. Input From User

To take input from the user, you can use the dart:io library.

   import 'dart:io';
   
    void main() {
        stdout.write('Enter your name: ');
        String? name = stdin.readLineSync();  // Reading input as a string
      
        stdout.write('Enter your age: ');
        String? ageInput = stdin.readLineSync();  // Reading input as a string
        int age = int.parse(ageInput!);  // Converting the string input to an integer
      
        print('Hello, $name! You are $age years old.');
 }

5. Conditional Statements

```dart
      void main() {
        int age = 20;
      
        if (age >= 18) {
          print('You are an adult.');
        } else {
          print('You are a minor.');
        }
      }
```

6. Functions

```dart
    void main() {
      printHello();
      int sum = add(5, 3);
      print('Sum: $sum');
    }
    
    void printHello() {
      print('Hello from a function!');
    }
    
    int add(int a, int b) {
      return a + b;
    }
```

7. Lists (Arrays)

      void main() {
     List<int> numbers = [1, 2, 3, 4, 5];
   
     for (int number in numbers) {
       print('Number: $number');
     }
   }

8. Maps (Dictionaries)

      void main() {
     Map<String, String> capitals = {
       'USA': 'Washington, D.C.',
       'India': 'New Delhi',
       'Japan': 'Tokyo'
     };
   
     capitals.forEach((country, capital) {
       print('The capital of $country is $capital.');
     });
   }

9. Classes and Objects

```dart
      void main() {
      Person person = Person('John', 30);
      person.greet();
    }
  
    class Person {
      String name;
      int age;
    
      Person(this.name, this.age);
    
      void greet() {
        print('Hello, my name is $name and I am $age years old.');
      }
    }
```

These examples cover basic concepts in Dart programming. You can run these snippets to see how each concept works.