I am sorry for the misunderstanding. If you are referring to a suitable variable name, I would suggest "min" and "max". 
Depending on the context of the array, you might also want to consider names such as "highest", "biggest", "strongest", "cheapest" etc. to make your code more readable.

If you are asking for a "statement" or function that would find you those values, please specify the programming language you are using.
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