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Tell me as much as you can about Interquartile range

Ok so Interquartile range. In descriptive statistics, the interquartile range (IQR), also called the midspread or middle 50%, or technically H-spread, is a measure of statistical dispersion, being equal to the difference between 75th and 25th percentiles, or between upper and lower quartiles, IQR = Q3 - Q1.

To find it you have to make a box and whisker plot and find the lower and upper quartiles. Once you do that you subtract the upper quartile from the lower and you have the interquartile range.