級別的附加課程

Not all labels are equally useful, but sometimes a lack of labels results in chaos. Let's do a task that dishes out labels: use the keyboard to enter an integer, and make the program indicate whether the number is negative or positive (or zero), and even or odd. Why do we need this? Just because, for practice. After all, we're here to learn!

Suppose we need to separate numbers according to some criteria. For example, based on whether they are even or odd, or based on the number of digits. Have you got a picture of that in your mind? And now for the work: we'll write a program that describes the number entered by the user (it must be in the range from 1 to 999). The description will indicate whether the number is even or odd, and how many digits it has.

At the "Optimist" school, the scale used to assess knowledge has neither an upper nor lower bound. This pleases young gifted people (wouldn't you be happy to receive a score of a bazillion for a presentation?). All scores above zero are considered good. Scores below zero are bad. Students must pass final exams in three subjects. We need to enter three scores from the keyboard, and display the number of positive scores.

Data analysis starts with a simple concept: we need to understand what data matters and should be used, and what data should be discarded. Let's solve a simple data analysis problem. We enter three integers from the keyboard, then we'll analyze them and display the number of positive and negative numbers in the source set.

Sometimes you don't need to think, you just need to hammer it out! As paradoxical as it may seem, sometimes your fingers will "remember" better than your conscious mind. That's why while training at the secret CodeGym center you will sometimes encounter tasks that require you to enter code. By entering code, you get used to the syntax and earn a little dark matter. What's more, you combat laziness.