I am adding address points for individual units in trailer/RV parks and I would like to be able to use the Field Calculator to assign the unit numbers. Is it possible to tell the Field Calculator a starting number and then have it run an equation on a selection like (n)+1 where n=the previous number? If so will it assign the numbers based on the ObjectID?

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From ESRI Support HowTo: Create sequential numbers in a field using Python in the Field Calculator

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