Dart Data Types

Dart Data Types

One of the most fundamental characteristics of a programming language is the set of data types it supports. These are the type of values that can be represented and manipulated in a programming language.

The Dart language supports the following types−

Numbers
Strings
Booleans
Lists
Maps
Numbers
Numbers in Dart are used to represent numeric literals. The Number Dart comes in two flavors −

Integer − Integer values represent non-fractional values, i.e., numeric values without a decimal point. For example, the value "10" is an integer. Integer literals are represented using the int keyword.

Double − Dart also supports fractional numeric values i.e. values with decimal points. The Double data type in Dart represents a 64-bit (double-precision) floating-point number. For example, the value "10.10". The keyword double is used to represent floating-point literals.

Strings
Strings represent a sequence of characters. For instance, if you were to store some data like name, address, etc. the string data type should be used. A Dart string is a sequence of UTF-16 code units. Runes are used to represent a sequence of UTF-32 code units.

The keyword String is used to represent string literals. String values are embedded in either single or double-quotes.

Boolean
The Boolean data type represents Boolean values true and false. Dart uses the bool keyword to represent a Boolean value.

List and Map
The data types list and map are used to represent a collection of objects. A-List is an ordered group of objects. The List data type in Dart is synonymous with the concept of an array in other programming languages. The Map data type represents a set of values as key-value pairs. The dart: core library enables the creation and manipulation of these collections through the predefined List and Map classes respectively.

The Dynamic Type
Dart is an optionally typed language. If the type of a variable is not explicitly specified, the variable’s type is dynamic. The dynamic keyword can also be used as a type annotation explicitly.

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