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How to Install and Use LPA WIN-PROLOG 4.9 on Windows

LPA WIN-PROLOG is a powerful and popular Prolog compiler system for Windows-based computers. Prolog is an AI language that allows you to create logic-based programs using rules and facts. In this article, we will show you how to download, install and use LPA WIN-PROLOG 4.9 on your Windows PC.

Downloading LPA WIN-PROLOG 4.9

LPA WIN-PROLOG 4.9 is a compressed file that contains the executable and the documentation files for the compiler. You can download it from the official website of Logic Programming Associates (LPA), the developers of WIN-PROLOG. Alternatively, you can use this direct link to download the file from Bitbucket.

The file name is LPA WIN-PROLOG 4.9.rar and it has a size of about 5 MB. You will need a program like WinRAR or 7-Zip to extract the contents of the file.

Installing LPA WIN-PROLOG 4.9

After extracting the file, you will see a folder named LPA WIN-PROLOG 4.9 that contains two files: WINProl.exe and WINProl.pdf. The first one is the executable file for the compiler, and the second one is the user manual.

To install LPA WIN-PROLOG 4.9, you just need to copy the folder to any location on your hard drive, such as C:\Program Files\LPA WIN-PROLOG 4.9\. You can also create a shortcut to the executable file on your desktop or start menu for easy access.

LPA WIN-PROLOG 4.9 does not require any special installation or configuration, and it works on all versions of Windows since 98SE.


To use LPA WIN-PROLOG 4.9, you just need to double-click on the executable file or the shortcut you created. This will launch the compiler window, where you can type or load Prolog programs and run them interactively.

The compiler window has a menu bar, a toolbar, a status bar, and two panes: the edit pane and the output pane. The edit pane is where you can type or load Prolog code, and the output pane is where you can see the results of your queries or commands.

You can use the menu bar or the toolbar to perform various actions, such as creating a new file, opening an existing file, saving a file, compiling a file, consulting a file, running a query, tracing a query, aborting a query, etc.

You can also use keyboard shortcuts for some of these actions, such as Ctrl+N for new file, Ctrl+O for open file, Ctrl+S for save file, F5 for compile file, F6 for consult file, F7 for run query, F8 for trace query, Esc for abort query, etc.

The status bar shows information about the current state of the compiler, such as whether it is ready or busy, how much memory it is using, how many clauses and predicates it has loaded, etc.

The user manual provides more details and examples on how to use LPA WIN-PROLOG 4.9 effectively. You can access it by clicking on Help > User Manual from the menu bar or by opening the PDF file directly.


LPA WIN-PROLOG 4.9 is a versatile and easy-to-use Prolog compiler system for Windows-based computers. It allows you to create and run logic-based programs using rules and facts. It also supports various features and toolkits for developing expert systems, graphical interfaces, web applications, data mining applications, etc.

In this article, we showed you how to download, install and use LPA WIN- 061ffe29dd

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