Hello World in Pascal

Welcome to the Hello World in Pascal page! Here, you'll find the source code for this program as well as a description of how the program works.

Current Solution

program HelloWorld(output);
begin
  writeln('Hello, World!');
end.

Hello World in Pascal was written by:

• Jeremy Griffith

This article was written by:

• Jeremy Grifski
• rzuckerm

If you see anything you'd like to change or update, please consider contributing.

How to Implement the Solution

Let's dig right into Hello World in Pascal.

As usual, we'll tackle this implementation line by line. Up first, we have the program line which declares the name of the program and a list of file descriptors.

Up next, we have our main block which is denoted by the begin and end keywords. Within this block, we have the print statement. Of course, the function we use in Pascal is called writeln.

Finally, we have a period, also known as a full stop. This indicates the end of the program.

As an added tidbit, semicolons mark the ends of statements, but they are optional on the last statement in a block. In other words, we could have removed the semicolon after the writeln command.

How to Run the Solution

If we want to try any of the Pascal code snippets from this article, we can use an online Pascal compiler. We just need to drop the snippets into the online editor and hit run.

Of course, we can always download and install Pascal locally. While we're downloading stuff, we should probably get a copy of the solution.

Assuming Pascal is now in our path, we can navigate to our folder containing the solution and run the following commands from the terminal:

fpc hello-world.p
hello-world.exe  # Windows
./hello-world  # Unix/Linux/Mac

Since Pascal is a compiled language, we first need to compile our script. After compilation, we'll have an executable we can run. When we run it, the "Hello, World!" string should print to the console.