Tasks

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!

Whoever wrote this program obviously did it in a hurry. Actually, that's not true: this program was written for educational purposes, and the author deliberately crammed in superfluous variables and simultaneously failed to declare necessary variables. We're going to correct this: Comment out the unnecessary variables, and declare the missing variables. Then the program will achieve universal harmony.

Laziness afflicts even the best programmers. And not only programmers. Nevertheless, people have managed to become professionals by teaching themselves. So, we suggest not being lazy. Instead, display this slogan on the screen: "If you feel like it, do the task. If you don't feel like it, do it anyway". And to really remember this, display it 16 times.

There are several ways to square a number. For example, some people write a number and then draw a square around it. This method is used by people who haven't studied anywhere. Everybody else has to multiply, remember the table of squares, ... or use a program. Your program should display the square of 5.

In a Java application, all the actions are performed by functions. Or more accurately, methods. In our program, a kind mentor has already implemented a method (that is, written the method's code) that can calculate the sum of two numbers. All you need to do is call this method with the arguments 2 and 2. You need to do this in the main method.

Display the variables whose values are names of fruit. Display each variable on a new line.

Today's programmers are rarely full-fledged engineers obsessed with technology and gadgets and nothing else. Some of them are also passionate about poetry. If you're a fellow poetry-lover, then you'll find it easy to perform the following task: display a quatrain (or more) from your favorite poem.

At the end of a level, it's helpful to unwind, watch an interesting video, and dream about your future. We suggest an excellent substitute for TV shows: videos about technology and famous nerds. During this break, you'll see Steve Jobs' famous speech to Stanford graduates. Let it inspire you to study with renewed intensity!

Writing your own methods is the way to achieve unlimited freedom, but it is also a great responsibility. We implement methods carefully and thoughtfully. This task requires you to write a print method that will display a certain string. Not once, but four times. The string is a method argument, meaning that it will be supplied as an input.

Well, we have a plan. Let's implement it. First, implement a method that calculates the circumference of a circle. To do this, you need to write the correct formula in the method and specify the arguments. But what about pi, which we know is 3.141592... and so on to infinity? We'll keep things simple: let pi = 3.14.

You've probably used electronic converters or programs on many occasions to convert a quantity of one unit to a quantity of another unit. For example, dollars to pounds, or kilometers to miles. Now it's time for us to write such a tool. Specifically, we'll write a program that converts from degrees Celsius to degrees Fahrenheit.

In Java, people come from the same place that other classes come from: from the programmer's head. It is important for the creator of a class to think through what is important for the class and what is not. If he or she does, then the class will make sense and be useful. Let's begin. Let's create a Person class that allows our Person to have a name, age, weight, and... money. And then we'll create an object.