Dart Flutter apps बनाउन प्रयोग गरिने प्रोग्रामिङ भाषा हो — Google द्वारा डिजाइन गरिएको एक आधुनिक, object-oriented भाषा UI बनाउनका लागि। Dart का मुख्य विशेषताहरु (यसको syntax, null safety, async support, र यो कसरी compile हुन्छ) बुझ्न Flutter development को लागि आवश्यक छ।
Dart भनेको के हो
Dart = Google's language for Flutter (and more):
→ OBJECT-ORIENTED, statically typed (with type inference)
→ familiar C-style/Java-like syntax (easy for many developers to pick up)
→ designed for UI development; compiles to native code (mobile) and JavaScript (web)
मुख्य Dart विशेषताहरु
// variables and types (statically typed with inference)
var name = 'Ann'; // inferred String
int age = 30; // explicit type
final pi = 3.14; // final (can't reassign)
const max = 100; // compile-time constant
// null safety — types are non-nullable by default
String name; // can't be null
String? nickname; // nullable (the ? allows null) — prevents null errors
// functions (including arrow syntax)
int add(int a, int b) => a + b;
// classes
class Person {
final String name;
Person(this.name); // concise constructor
}
