What is the meaning of “exclusive” and “inclusive” when describing number ranges?

Question

Simple question but, I see exclusive and inclusive when referring to number ranges.

For example, this is a line from an algorithms book:

The follo

Answer 1

In Computer Science, inclusive/exclusive doesn't apply to algorithms, but to a number range (more specifically, to the endpoint of the range):

1 through 10 (inclusive)
1 2 3 4 5 6 7 8 9 10

1 through 10 (exclusive)
1 2 3 4 5 6 7 8 9

In mathematics, the 2 ranges above would be:

[1, 10]
[1, 10)

You can remember it easily:

• Inclusive - Including the last number
• Exclusive - Excluding the last number