Dart Beginner to Advance course [With null safety] || 2023

Define the main function as the entry point of a dot program, explain its void return type, and print hello world inside its curly braces.

Master the hello world Dart example by defining the main entry point, using print statements, and printing strings, numbers, and booleans with proper semicolon termination.

Discover the 61 reserved keywords in dot, learn that they have special compiler meanings and cannot be used as variable, class, or function names, and are case sensitive.

Understand Dart identifiers as names for variables and functions, with rules: cannot start with a digit, may begin with underscore, no spaces, and names must be unique.

Explore built-in Dart data types, including number with int and double. Also cover strings, bool, lists, sets, and maps used to define variables.

Learn how to use Dart comments to document variables, methods, and classes, including single-line, multi-line, and documentation comments, while noting that comments are ignored by the compiler.

Define variables as named memory spaces that store values in a running program, using the variable name as an identifier to call data according to the language rules.

Explore how var and dynamic keywords control dynamic type behavior in Dart, demonstrating type inference, assignment, and errors when referencing before declaration and mixing string and int types.

Explore static data types such as string, int, double, and boolean. Understand type checking, non-nullable rules requiring initial assignment, and nullable with ?.

Learn to declare late variables in Dart and initialize them later, using the late keyword for server or API values and printing the results, per official documentation.

Learn how to convert strings to integer and double values using parse, and how to convert integers and doubles back to strings, with runtime type checks and practical examples.

Learn how to declare single-line and multi-line strings in Dart, perform string interpolation and concatenation, and explore methods like length, isEmpty, toUpperCase, contains, substring, and replaceAll.

Learn how the Dart bool type represents true and false using the bool keyword, create boolean variables, and evaluate expressions like 10 > 12 and 13 > 12.

Explain how to create and manipulate string lists in Dart, covering list creation, indexing, length, and common operations like add, insert, remove, and nested lists.

Explore maps in Dart as an abstract data type that stores unique keys with values; define key value pairs and learn to add, update, access, and remove them.

Master defining and calling functions in Dart, including void return types, parameters, returning values, and treating functions as first-class objects to modularize code.

Explains how to define required, optional positional, and named parameters in Dart, with a student function illustrating defaults, null safety, and named arguments.

Explore how fat arrow notation simplifies single-line function bodies in Dart, yielding cleaner code. Compare its use with multi-statement functions that require curly braces.

Learn how Dart's if-else conditional statements evaluate conditions, execute blocks when true or false, and use operators like >, ==, and != with examples using values 10 and 30.

Learn to implement a switch statement in Dart to map numbers to days, covering syntax, case, break, default, and fall-through for multiple cases.

Master Dart conditional expressions, the language's only ternary operator, to replace simple if-else logic and assign results with a three-operand expression.

Explore the third type of conditional expression in dart, which uses two operands and returns the right side when the left is null, otherwise returns the left.

Explore how to build an if-else ladder to handle multiple conditions using else-if blocks, and print outcomes like excellent, very good, good, and poor.

Explore how to implement for loops in Dart to perform repetitive tasks, printing numbers from 0 to 99 with initialization, condition, and update.

Learn how to define and use a while loop in Dart, including condition, code block, and update statement, and compare it with a for loop.

Explore the do while loop in Dart: define with do, execute code in braces, print i, then check i <= 100 and increment i; contrast with pre-check of while loop.

Demonstrate the break keyword to terminate a for loop at 50, then use a nested for loop with i and j and labeled breaks to stop the outer loop.

Master Dart's continue statements in loops, including labeled continues, to control flow by skipping inner loop iterations and transferring control to the outer loop as shown through for loops.

Learn how to define a circle class in Dart, create objects, and manage state with a radius while implementing behaviors like set radius, get area, and get circumference, plus constructors.

Define a constructor in a circle class to require a radius at creation, explore positional and named constructors, and use the this keyword and required for null safety.

Explore the four types of constructors in Dart: default, parameterized, named, and factory. Understand default constructors with no parameters and automatic calls, parameterized and named constructors with dot syntax.

Explore factory constructors in Dart to return class or subclass instances based on input values, enable caching and singletons, and construct objects from JSON maps.

Explore how Dart uses default and custom getters and setters to read and assign class field values, illustrated with a car example, private underscore fields, and fat-arrow syntax.

Explore how Dart inheritance uses extends to create a superclass and subclass, enabling code reuse, polymorphism, and overriding methods with the super keyword in constructors.

Explore polymorphism and abstract classes in Dart by defining an abstract vehicle base class with maker and model, and concrete car and motorcycle subclasses that override start and stop methods.

Learn how Dart interfaces define a contract, enabling multiple inheritance via implements, with a shape example (circle, rectangle) and get area and get perimeter methods.

Explore lambda functions in Dart as inline anonymous functions, using fat arrow for single expressions and curly braces for multi-line bodies, with examples of higher-order use and simple addition.

Explore higher order functions in Dart by passing function as arguments and returning functions, with practical examples using for each and map on integer lists.