When a variable is created in Dart, it has an associated data type, just like in other languages (C, Python, Java).
Data types for a variable specifies the following:
Dart is a programming language that is statically typed; this means that variables always have the same type, which cannot be changed.
Data types in Dart programming are given below:
In Dart, numbers are used to represent numeric literals. Dart numbers are grouped into two types:
Integer: represents non-fractional numbers (whole numbers). Integers can be declared with the int keyword.
Double: represents fractional numbers (floating-point numbers). Doubles can be declared with the double keyword.
void main() {//declare a integer valueint num1 = 1;// declare a double valuedouble num2 = 1.5;print(num1);print(num2);}
A string represents string literals and is a sequence of characters. A string is declared with the String keyword.
void main() {String str = 'Educative';print(str);}
A boolean represents true and false values. It is declared with the bool keyword.
void main() {bool val = true;print(val);}
A list is used to represent a collection of objects. It is similar to the concept of an array in other programming languages. A list is a group of ordered objects.
void main(){List shot = List(3);shot[0] = 'Data types';shot[1] = 'in';shot[2] = 'Dart';print(shot);// access the first indexprint(shot[0]);}
A map is a dynamic collection that represents a set of values as key-value pairs. Keys and values on a map may be of any type.
void main(){Map shot = Map();shot['0'] = 'Data types';shot['Second'] = 'in';shot['a'] = 'Dart';print(shot);}