// Implicit type = int var myVariable = 5; // Explicit type: String String name = "Kral"; // Dynamic type: dynamic dynamic dinamik = "Dynamic"; dinamik = 5; // Valid // Constant final name = "Enes"; const name = "Enes"; // Anything that isn't known at  // compile time  // should be final over const.

// Enum enum Color { red, green, blue } var aColor = Color.blue; // aColor has index, hashCode & toString() parameters by default. // Enum cases can not contain associated values like in Swift. // Computed variables & Functions can't be added directly to the enum. // But they can be added via an extension. extension DarkMode on Color { Color get darkModeAlternative { switch (this) { case Color.blue: return Color.red; default: return Color.blue; } } }

typedef GestureTapCallback = void Function();

// Check type if (myVariable is String) { .. }

// Declaration var string1 = "String"; var string2 = 'String'; // Multiline var multilineStr = """ Here you can have your string multiline for easier readability; Start & end with 3 quote character. """; // String interpolation var name = "Enes"; print("Hello $name"); print("For objects use ${person.name}");

// Declaration String greet(String name) { return "Hey $name"; } // Optional named parameters void greet(String name) { } greet("Enes"); // Named parameters void greet({required String name}) { } greet(name: "Enes") // Default parameters void greet({String name = "Enes"}) { } greet(); greet(name: "Kral"); // Var args // N/A // List can be used to achieve // similar behaviour // or visit `VarArgs` package below. // Closure/Lambda var square = (int x) => x * x; square(4);

// if & else(if) if (isRaining()) { you.bringRainCoat(); } else if (isSnowing()) { you.wearJacket(); } else { car.putTopDown(); } // for loops for (var i = 0; i < 5; i++) { print('Flutter ${i + 1}'); } // for-in var obj = ["Android","iOS","Flutter"]; for (var prop in obj) { print(prop); } // for-each var collection = ["Android", "iOS", "Flutter"]; collection.forEach(print); // or var callbacks = []; for (var i = 0; i < 2; i++) { callbacks.add(() => print(i)); } callbacks.forEach((c) => c()); // while while (!isDone()) { doSomething(); } // do-while do { printLine(); } while (!atEndOfPage()); // break while (true) { if (shutDownRequested()) break; processIncomingRequests(); } // continue for (int i = 0; i < candidates.length; i++) { var candidate = candidates[i]; if (candidate.yearsExperience < 5) { continue; } candidate.interview(); } // or candidates .where((c) => c.yearsExperience >= 5) .forEach((c) => c.interview()); // switch-case var option = 1; switch (option) { case 1: print("Android"); break; case 2: print("iOS"); break; default: print("Flutter"); break; } // switch-continue var option = 1; switch (option) { case 1: print("Android"); continue testCase; testCase: case 2: print("iOS"); break; } 

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// Declaration String str = null; // Invalid String? str = null; // Valid str?.toUpperCase(); // Safe call String? str = "enes"; str?.toUpperCase(); // "ENES" // Null aware operator int? id = null; var userId = id ?? -1; // -1 int? id = 53; var userId = id ?? -1; // 53

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