int16 error on model swift3

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In swift 3 int16 is not able to be used in the model.Instead of that, you can use the NSNumber datatype in that to resolve the issue.

If you used the int16 vales in core data models they will give some run time exceptions.So better you must have to try with the NSNumber. NSNumber will accept all the number values.So it's better to compare with int16.  

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