There are only two ways to tell somebody thanks: Kudos and Marked Solutions Unofficial Forum Rules and Guidelines "Not that we are sufficient in ourselves to claim anything as coming from us, but our sufficiency is from God" - 2 Corinthians 3:5
The black diamond at the top tells us that the upper limit, 6, is include, and the blank diamond at the bottom tells us that the lower limit, 4, not is include. So in range will be true if: 4 < X =< 6.