In the short history of computer programming, one enduring tradition is that
the first program in a new language is a "Hello, world" to the screen. So
let's do that. Copy and paste the program below into your IDE or text
editor, then compile and run it.
If you have no idea how to do this, return to the Table of Contents.
Earlier lessons explain what a compiler is, give links to downloadable
compilers, and walk you through the installation of an open-source Pascal
compiler on Windows.
program HelloWorld;
begin
writeln ('Hello, world.');
end. |
The output on your screen should look like:
If you're running the program in an IDE, you may see the program run in a
flash, then return to the IDE before you can see what happened. See the
bottom of the
previous
lesson for the reason why. One suggested solution, adding a readln
to wait for you to press Enter before ending the program, would
alter the "Hello, world" program to become:
program HelloWorld;
begin
writeln ('Hello, world.');
readln;
end. |
If you use Borland Turbo Pascal for Windows then you have to add uses
part and include wincrt library because that compiler must have that library
included.
So program in Borland Turbo Pascal for Windows would look like this :
| program HelloWorld;
uses wincrt;
begin
writeln ('Hello, world.');
readln;
end. |
Default background in Borland Turbo Pascal for Windows is white and
letters are black, so the output on your screen should look like:
