Range tells you the interval in which the f(x) values are found.
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It tells you that middle half the observations lie within the IQR.
Range is a measure of variation; mode is a measure of center. Range will tell you how much the data vary, mode does not tell you how much the data vary.
Range
for the data set shown below find the interwar range IQR. 300,280,245,290,268,288,270,292,279,282
range