Author: saqibkhan

Functions are the building blocks of readable, maintainable, and reusable code. A function is a set of statements to perform a specific task. Functions organize the program into logical blocks of code. Once defined, functions may be called to access code. This makes the code reusable. Moreover, functions make it easy to read and maintain…

An enumeration is used for defining named constant values. An enumerated type is declared using the enum keyword. Syntax Where, Each of the symbols in the enumeration list stands for an integer value, one greater than the symbol that precedes it. By default, the value of the first enumeration symbol is 0. For example Example It will…

Strings are a sequence of characters. Dart represents strings as a sequence of Unicode UTF-16 code units. Unicode is a format that defines a unique numeric value for each letter, digit, and symbol. Since a Dart string is a sequence of UTF-16 code units, 32-bit Unicode values within a string are represented using a special…

Symbols in Dart are opaque, dynamic string name used in reflecting out metadata from a library. Simply put, symbols are a way to store the relationship between a human readable string and a string that is optimized to be used by computers. Reflection is a mechanism to get metadata of a type at runtime like…

The Map object is a simple key/value pair. Keys and values in a map may be of any type. A Map is a dynamic collection. In other words, Maps can grow and shrink at runtime. Maps can be declared in two ways − Declaring a Map using Map Literals To declare a map using map…

A very commonly used collection in programming is an array. Dart represents arrays in the form of List objects. A List is simply an ordered group of objects. The dart:core library provides the List class that enables creation and manipulation of lists. The logical representation of a list in Dart is given below − Lists can be classified as − Let us…

Dart provides an inbuilt support for the Boolean data type. The Boolean data type in DART supports only two values – true and false. The keyword bool is used to represent a Boolean literal in DART. The syntax for declaring a Boolean variable in DART is as given below − Example It will produce the…

The String data type represents a sequence of characters. A Dart string is a sequence of UTF 16 code units. String values in Dart can be represented using either single or double or triple quotes. Single line strings are represented using single or double quotes. Triple quotes are used to represent multi-line strings. The syntax…

Dart numbers can be classified as − The num type is inherited by the int and double types. The dart core library allows numerous operations on numeric values. The syntax for declaring a number is as given below − Example It will produce the following output − Note − The Dart VM will throw an exception if fractional values are assigned to integer variables. Parsing The parse() static…

A conditional/decision-making construct evaluates a condition before the instructions are executed. Conditional constructs in Dart are classified in the following table. Sr.No Statement & Description 1 if statementAn if statement consists of a Boolean expression followed by one or more statements. 2 If…Else StatementAn if can be followed by an optional else block. The else block will execute if the Boolean expression tested by…