Solution 13660: Using Greek Symbols In Programming Scripts on the TI-83 Plus and TI-84 Plus Family of Graphing Calculators.
Can Greek symbols be used when creating programs on the TI-83 Plus and TI-84 Plus family of graphing calculators?
The TI-83 family, TI-84 Plus family, or TI-Nspire handheld in TI-84 Plus mode only supports single letter alphabetical characters (A-Z) as programming variables. There is not a way to add the Greek symbols to the list. Greek symbols will have to be replaced with a letter (A-Z) so the calculator can recognize it as a program variable.
Greek symbols are used in some system variables. For example, lowercase sigma is used as part of the system variable used for standard deviation. However, these variables are output-only variables used by the system to store the results of calculations. A program may recall or display an output-only variable, but it may not store a value to it directly.
Please see the TI-83 family and TI-84 Plus family guidebooks for additional information.
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