Casio 330 - Manual (Page 665)

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Editing a User-defined Function
To edit an existing user-defined function, use the same procedures as those described under
“Modifying an Existing Program to Create a New One” on page 12-3-2. Editing procedures
are the same, regardless of whether you originally created the function using the Define
command or Program Editor.
Deleting a User-defined Function
To delete an existing user-defined function, use the same procedure as the one described
under “Deleting a Program” on page 12-4-1. The delete procedure is the same, regardless of
whether you originally created the function using the Define command or Program Editor.
12-5-4
User-defined Functions