Count of all integers from 20 to 90 inclusive

<-- Enter start number
<-- Enter end number

How many integers are there from 20 to 90 inclusive?

The formula to count the number of integers is below:
Count = B - A + 1

Plugging the numbers A = 20 and B = 90 into the formula, we get:
90 - 20 + 1
Count = 71