Chapitre 3. Utilisation de base
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# Chapitre 3. Utilisation de base

## Utilisation de la zone de travail

Normally you interact with the calculator in the Console tab of the work area. If you are running the text only version then the console will be the only thing that is available to you. If you want to use Genius Mathematics Tool as a calculator only, just type in your expression in the console, it will be evaluated, and the returned value will be printed.

To evaluate an expression, type it into the Console work area and press enter. Expressions are written in a language called GEL. The most simple GEL expressions just looks like mathematics. For example

    genius> 30*70 + 67^3.0 + ln(7) * (88.8/100)

or

    genius> 62734 + 812634 + 77^4 mod 5

or

    genius> | sin(37) - e^7 |

or

    genius> sum n=1 to 70 do 1/n

(Last is the harmonic sum from 1 to 70)

Pour obtenir une liste des fonctions et commandes, saisissez :

    genius> help

Si vous souhaitez obtenir plus d'aide sur une fonction précise, saisissez :

    genius> help NomDeLaFonction

Pour afficher ce manuel, saisissez :

    genius> manual

Suppose you have previously saved some GEL commands as a program to a file and you now want to execute them. To load this program from the file `path/to/program.gel`, type

    genius> load path/to/program.gel

Genius Mathematics Tool keeps track of the current directory. To list files in the current directory type ls, to change directory do `cd directory` as in the UNIX command shell.

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Démarrage de Genius | Sommaire | Création d'un programme