This calculator (as do many other Casio scientific calculators) uses one and the same key for both the constant π as well as exponents. This works as follows. When you first enter digits, the "EXP"-key will enable you to enter the numbers exponent, otherwise it will enter the constant π.
This calculator however makes excellent use of the possibilities of a graphical display and a more modern user interface. First steps towards a newer and better user interface can be seen in the earlier Casio fx-8700G. The Casio fx-9700GE has some refinements. When the calculator is switched on, an "icon menu" shows the available calculation modes. The "PRE"-key is replaced by an "EXIT"-key; every calculation mode has a "SET UP" screen where its behaviour can be changed. Specific modules such as the built-in text editor can be stopped using the "QUIT" function.
Functionally this calculator is quite nice as well. I especially like the Table function, where any particular function can be viewed in a table for a defined range of input values. Especially nice is the Table function for recursive functions (see the implemtation of (n+1)! on the right). A very nice function to play with and study any particular recursive function definition.
Very nice as well are dynamic graphs, where the effect of changing one variable in a function can be displayed graphically.
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This page was last modified on February 6th, 2009