Question: The first positive integer parameter indicates the starting number in the pattern. The second positive integer parameter indicates the value that is to be added

The first positive integer parameter indicates the starting number in the pattern.
The second positive integer parameter indicates the value that is to be added to obtain each subsequent number in the pattern.
The AdditionPattern class also supports the following methods.
currentNumber, which returns the current number in the pattern
next, which moves to the next number in the pattern
prev, which moves to the previous number in the pattern or takes no action if there is no previous number

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