Overview Of Entering A Function; Why Create A User-Defined Function? - Texas Instruments TITANIUM TI-89 User Manual

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To run the program from the Home screen:

The user must specify the

applicable values as

arguments within the ( ).

The arguments, in order, are

passed to the program.

This example assumes that the user enters values that can be displayed by the

viewing window set up by

Overview of Entering a Function

A function created in the Program Editor is very similar to the functions and instructions

that you typically use from the Home screen.

Functions (as well as programs) are ideal for repetitive calculations or tasks. You only

need to write the function once. Then you can reuse it as many times as necessary.

Functions, however, have some advantages over programs.

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