Introduction

Shows

Overview

The idea of EULER is a system with the following features

Most version are in a notebook style. You can edit old commands and execute them again. Moreover, you can add text to every command. The notebook supports a color scheme to distinguish between commands, text and output.

EULER is an ideal tool for the tasks such as

Files and Installation

EULER consists of the following files at least

Note that there might be a command in euler.cfg to switch directory, so the program files need not be in the same directory. There are some additional files, which help using the program

You should name your EULER program files *.e.

To exit EULER issue the command

    > quit

or close the EULER window.

The Demo

The best way to get a good introduction into EULER is to run the demo. To do that issue the command

    >load demo

Do not enter the prompt ">" and press the Return key. Of course, the file DEMO must be in the active directory. This is usually the progs directory and shoudl be set up automatically. There is also an automatic, non-interactive demo, which you might load with

    >load autodemo

You can learn to program EULER by studying the demo file, of course.

If you are using a notebook version, you should start by loading the welcome.en notebook.

Online EULER Help

You can select Help from the menu bar or press the F1 key to see the help text. Also

    >help function

will show the help text of a function (see "programming EULER"). For user defined functions, this is a very good way to remember their purpose and give some documentation to the user.

For builtin functions and commands, the help command will display the help text from help.txt. This file is loaded at the start of EULER and is ASCII readable. The format is simple and you are welcome to extend this file with your own comments. It does also contain help for brackets, as in

    >help (

There is also this documentation, which explains how all these commands are supposed to work together.