BJP4 Exercise 5.20: digitRange

Language/Type: Java method basics mod return while loops
Author: Marty Stepp (on 2016/09/08)

Write a method named `digitRange` that accepts an integer as a parameter and returns the range of values of its digits. The range is defined as 1 more than the difference between the largest and smallest digit value. For example, the call of `digitRange(68437)` would return 6 because the largest digit value is 8 and the smallest is 3, so 8 - 3 + 1 = 6. If the number contains only one digit, return 1. You should solve this problem without using a `String`.

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This is a method problem. Write a Java method as described. Do not write a complete program or class; just the method(s) above.

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