Dart Data Types

In this chapter, we will learn about different Data Types that are available in dart.

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Dart Data Types

Different data types are available in dart. For example,

String name = ‘Phil’;

int number = 22;

Here,

‘Phil’ is string data.

22 is integer data.

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Dart has the following data types:

Data Types	Description	Keyword
Strings	Sequence of textual characters	String
Numbers	Integer or floating point number	int, double, num
Booleans	Values true and  false	bool
Lists	set of objects	List
Maps	Set of value of key/value pairs	Map

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Dart Strings

String refers to the collection of characters. In dart, strings are enclosed in either single quotes or double quotes. The keyword String is used to represent string value.

For example,

String name = ‘Phil’;

String name = ‘Lauren’;

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Dart Numbers

Numbers represent integer values and floating values. For integer values, keyword int is used. And for floating values, keyword double is used. The num keyword represents numbers in general.

For example,

int value1 = 35;

double value2 = 35.89;

num value3 = 35.89;

num value4 = 35;

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Dart Booleans

Boolean values represent true and false. The bool keyword is used to denote boolean values.

For example,

bool isValue = true;

bool count = false;

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Dart Lists

In dart, the list represents a collection of objects/values. We can create a list data type by enclosing the values in square braces. For example,

var numbers = [4, 8, 2.4, 5];

Another way to create a list is by passing the new keyword to the List object. For example,

List names = new List();

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Dart Maps

In dart, maps denote a collection of data in key/value pairs. The key and value can be of any data type. We can create a map data type by enclosing the value in curly braces and separating each pair by comma. For example,

var person = {‘name’: ‘Phil’, ‘age’: 25, isMale: true}

Another way to create map data is by passing the new keyword to the Map object. For example,

Map person = new Map();

In map data types, keys must be unique.