Lower bound and upper bound

Lower bound refers to the smallest possible value in a set of numbers or a range of values. It is the point below which no values can exist. For example, in a set of numbers {5, 6, 7, 8, 9}, the lower bound is 5.

Upper bound refers to the highest possible value in a set of numbers or a range of values. It is the point above which no values can exist. For example, in a set of numbers {5, 6, 7, 8, 9}, the upper bound is 9.