## Lesson goal: Data science: find the maximum value in a file

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Again suppose that sample.dat contains a list of amounts spent by patrons during lunch at a retaurant. Let's see if we can tell the owner what his maximum sale amount was. In other words, let's find the maximum number in the file sample.dat.

We'll need a loop to be able to examine each number in the file, and we'll apply some coding logic to try and figure what the maximum value is in the data file.