TI-BASIC:Number Or List

Routine Summary

Determines whether an input is a number or list.

Inputs

Ans - the number or list to examine

Outputs

Ans - 1 if the input is a number, 0 if it is a list (see criteria below)

Variables Used

Calculator Compatibility

TI-83/84/+/SE Author

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As long as Ans is always contains more than one element and the second element is not twice that of the first, this will determine if Ans is a list or not:

Ans(2)=2Ans(1

If Ans is a number, this will always return 1, else if it is a list meeting the above criteria it returns 0.