medianValue is the median of the numbers in your array. The median is the number in the

array that has exactly the same number of values that are greater than or equal to it as it has

values that are less than or equal to it$.$ In an array with an odd number of indices, this is a

value from the array itself. In an array with an even number of indices, this is the average of

the two middle values in the array. For example, for the array $[589102319],$ the median

is $[011235899]->3.$ For the array $[102113124],$ the median is $[234101112]->$

$(4+10)/2=7.$ Note that the numbers before and after the median can be the same as the

median. The median of $[12222222223]$ is $[12222222223]->2$