Check if there is no consecutive numbers in range
<p>I've got a range of values. 
I need to check for each value above zero:
If any two values in range are consecutive (located next to each other, like 7 an 8) - type "Yes". 
Otherwise - "No".</p>

<p>Update:
I should have only one answer yes/no for a given range. I need to check if there is at least one instance of consecutive numbers within the range.</p>