Comments
are inserted into Pascal programs by enclosing the comment within { and } braces. Comments are ignored by the computer, but are helpful to explain how the program works to other programmers.

A Pascal program with comments

	program DEMOPROG (output);
	begin
		write('Hello there.');
		{the write statement does not set the cursor
		 to the beginning of the next line. }
		writeln('This is getting boring.')
		{ This is printed on the same line as Hello 
		  there, but now the cursor moves to the beginning 
		  of the next line, because this time we used writeln 
		  instead of write  }
	end.