Data Types in Dart Programming Language | Flutter Malayalam Tutorials

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In this video, we will discuss some of the data types that are available in the Dart programming language.

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[TATA_evo]

Void main(){

}

Function used to group some activity

Void main – function without return. “main” is function

Data types

1) String-
String variable name = “string value”

In dart for every variable created, there should be specific data type
String value should be in double quotes ( “ ” )

Eg for String data type

String className = “Flutter Tutorial”;

2) Integer ( int )
Eg for int data type

Int studentCount = 25;

3) Double ( double ) – decimal point

Eg for double data type

double averageMark = 35.6;

4) Number ( num )
Eg for num data type

num availableDays = 5;

num availableDays = 5.5;

num can perform both integer & double value



5) Boolean ( bool )
True or False

Eg for bool

bool activeClass = true;

6) Variable ( var )
Output value can be any data type
Can be used when we don’t know what output will get or what data we want to process

7) dynamic
similar to var

8) array ( [ ] )

Group of value
In dart, there is no array data type, we use List<>

9) List<>
In List<> , we can store any data type

List<datatype> = value in square bracket

Eg for List<>

List<string> studentNames = [ “Manu”, “Jithin”, “Sam” ];

Values inside List<> can be accessed by it’s position, starting from Zeroth position.
In the above, Manu is zeroth and Jithin in first position.

Print(studentNames[0]); It’s result is Manu

Eg-2

List<int> testList = [0, 1, 2];

Eg-3

List<dynamic> dynamicList = [“Start test”, 100, true, 100.5];

print(dynamicList); It’s result is [Star test, 100, true, 100.5]

10) Map<>
It should have Key, Value

Eg for Map<>

Map<String, String> mapVariable = {
};

In List<>, we use square bracket and in Map<>, we use curly bracket

For the above example, first String is Key


Map<String, String> mapVariable = {
“name” : “ Mallu Developer”
};

Here for variable called mapVariable, name is key and Mallu Developer is value

print(mapVariable); it’s result is {name: Mallu Developer}


Eg-2

Map<String, dynamic> student = {
“Name”: “Arun”,
“age”: 25,
“mark”: 100.5,
“pass”: true,
“class”: “Flutter”,
};

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