Dart Programming — Learning Variables.

Dart Programming — Learning  Variables.

Variables are used to store information to be referenced and manipulated in program. Variables are nothing but a kind of containers which…

Variables are used to store information to be referenced and manipulated in the program. Variables are nothing but a kind of container that holds a piece of information. The main purpose of variables is to store and label data in memory, that can be used later on.

Dart language supported the following types:

  • Numbers
  • Strings
  • Boolean
  • Lists
  • Maps
  1. Numbers

Numbers in dart represent numeric literals. Programmer can define Numbers as Integer or as Double

*Integer: *Integer values represent non-fractional values (numeric values without decimal point) e.g. “5”

declared as:

 int a = 5;

int is a keyword to declared it as an Integer type, a is the variable name, =is assignment operator, 5 is the value of variable a; indicates the end of the statement.

Double: Double values represents fractional values (numeric values with a decimal point) e.g. “5.5”

Declared as,

double b = 5.5;

double is a keyword to declare it as Double type, b is a variable name, = is assignment operator, 5.5 is the value of variable b; indicates the end of the statement.

2. String

Strings represents a sequence of characters. For Example, if a programmer wants to store first name, last name, etc. the String data type should be used.

declared as:

String first_name = “XYZ”;

String is the keyword to declared it as String type, first_name is a variable name, = is assignment operator, XYZ is value for a string variable.

String values are enclosed in either single or double quotes.

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