Please see screenshot attached. The value of comparison count is not $45$ I dont know where is mistake.

In this part you will investigate how many comparisons between list items exchange sort requires to sort some lists of different lengths.

i$.$To count the comparisons, we have provided a variable comparison$\_$count.

The only place where list items are compared is in the when$\_$green$\_$flag$\_$clicked script. Add a block to this script at an appropriate point to increment comparison$\_$count each time two list items are compared.

We are not quite done, because comparison$\_$count needs to be initialised to $0$ at the start of the when$\_$green$\_$flag$\_$clicked script, before we start the sort. Add a block to initialise comparison$\_$count at an appropriate point in the script.

Then make sure the watcher for comparison$\_$count is visible on the stage, and run the when$\_$green$\_$flag$\_$clicked script.

You should find that once the script has run the value of comparison$\_$count is $45.$