Hello World Program is a basic Simple First program or application to code and learn any new programming language.
It just displays the hello world string to the console.
This post shows how to write a hello world application in Dart Programming language.
Dart Hello World example program
Following are steps to create a Hello World program in Dart programming language
- First, Open any source code editor
- Create a file called
HelloWorld.dart
- Add the following code
//Hello World Sample First Program
void main() {
print('Hello World First Program');
}
The above program contains three parts.
Comments
:
The comments are ignored by the compiler and provide a useful message about the line or block of a code.
//Hello World Sample First Program
main()
: It is a function called by dart runtime and Entry point for dart program to execute.
Every dart executable code has a main() function and it does not take any arguments i.e empty arguments.
Every function in the dart has a return type.
main() function has a return type void
. It does not return anything.
The function body is enclosed with {}
Print()
: It is used to log the string or a message to the console. It is a standalone IO function.
Next, compile and run the program.
How to run dart program
We can compile and run the program in many ways in dart programming
-
Command-line
- Open terminal command line.
- Go to directory or folder where program exists.
- run the below command(dart HelloWorld.dart)
A:\work\dart>dart HelloWorld.dart Hello World First Program
-
online browser dartpad
-
open dartpad in browser
-
Create a new Pad
-
Type the HelloWorld code or copy it
-
Click on the Run button on the opened pad.
-
you will see the
Hello World First Program
message in the Console window. -
Source Code Editor or IDE
-
-
you can open any editor of your choice such as
VSCode
-
Run inbuilt compiler support or open terminal and run as per command line