log

Hello world!

);

Try it out in DartPad.

Variables

Dart is type safe—it uses a combination of static type checking
and runtime checks to ensure that a variable’s value always matches
the variable’s static type. Although types are mandatory,
some type annotations are optional because
Dart performs type inference.

Creating and assigning variables

In JavaScript, variables cannot be typed.

In Dart, variables must either be explicitly
typed or the type system must infer the proper type automatically.

// JavaScript

var

name

JavaScript

Try it out in DartPad.

For more information, see Dart’s Type System.

Default value

In JavaScript, uninitialized variables are undefined.