Dart Assignment

variable = expression;

int a;
int b;
int c;

// Evaluates right-to-left: c = 5, then b = 5, then a = 5.
a = b = c = 5; 

List<int> listA = [1, 2, 3];
List<int> listB;

// listB now holds a reference to the exact same object in memory as listA.
listB = listA; 

num myNumber;
int myInteger = 10;

// Valid: 'int' is a subtype of 'num'
myNumber = myInteger; 

// Invalid: Compile-time error. 'double' is not a subtype of 'int'
// myInteger = 10.5; 

String nonNullableString;
String? nullableString = null;

// Invalid: Compile-time error. Cannot assign a nullable type to a non-nullable type.
// nonNullableString = nullableString;