Programming for ML with no experience — if you can type, you can begin
Suppose you are keeping track of test scores: score1 = 87, score2 = 91, score3 = 76. That already looks clumsy with three scores. Now suppose the class has a hundred students. Nobody writes score1 all the way through score100 as a hundred separate variables, and even if someone did, there would be no way to ask a single question like "how many scores are there" without counting variable names by hand.
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