Dart syntax forms the foundation of writing clean, efficient code in the Dart programming language. Understanding these fundamental rules is crucial for developers working with Dart or Flutter.

Basic Structure

Dart programs typically start with a main() function, the entry point of execution. Here's a simple example:


void main() {
  print('Hello, Dart!');
}

Variables and Data Types

Dart uses Dart Variables to store data. You can declare variables using var, or specify the type explicitly:


var name = 'John';
String surname = 'Doe';
int age = 30;
double height = 1.75;

For more details on data types, check out Dart Data Types.

Functions

Functions in Dart are declared using the following syntax:


returnType functionName(parameterType parameter) {
  // Function body
  return value;
}

For a deeper dive into functions, visit Dart Function Basics.

Control Flow

Dart provides various control flow statements:

If-Else Statements


if (condition) {
  // Code to execute if condition is true
} else {
  // Code to execute if condition is false
}

Learn more about conditional statements in Dart If-Else Statements.

Loops

Dart supports several types of loops:


// For loop
for (var i = 0; i < 5; i++) {
  print(i);
}

// While loop
while (condition) {
  // Code to execute
}

// Do-while loop
do {
  // Code to execute
} while (condition);

Explore more about loops in Dart For Loops and Dart While Loops.

Classes and Objects

Dart is an object-oriented language. Here's a basic class structure:


class Person {
  String name;
  int age;

  Person(this.name, this.age);

  void sayHello() {
    print('Hello, my name is $name');
  }
}

For more on object-oriented programming in Dart, check out Dart Classes and Dart Objects.

Best Practices

Use meaningful variable and function names
Follow Dart's style guide for consistent code formatting
Utilize Dart Comments to explain complex logic
Leverage Dart's Dart Static Typing for better code quality

By mastering Dart syntax, you'll be well-equipped to write efficient, readable code for various applications, including Flutter development.