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JavaScript: Infinity

The "divide by zero" error in programming is well known. In low-level languages, it causes the program to fail and restart. Where others fail, JavaScript continues to work.

console.log(1 / 0); // ?

Try to execute this code in your browser console. You will see Infinity displayed on your screen. For those who have studied further mathematics (hi, math geeks!), this is not a surprise. Division by zero creates infinity. Infinity in JavaScript is a real number, and you can perform various operations with it. In day-to-day problems, this makes little sense, since most operations with infinity end in infinity, for example, when we add a number to infinity we get infinity anyway.

Infinity + 4; // Infinity
Infinity - 4; // Infinity
Infinity * Infinity; // Infinity

However, there are several examples where infinity is needed. This question is discussed in more detail on Hexlet.


Print the sum of infinities divided by 10.

The exercise doesn't pass checking. What to do? 😶

If you've reached a deadlock it's time to ask your question in the «Discussions». How ask a question correctly:

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In my environment the code works, but not here 🤨

Tests are designed so that they test the solution in different ways and against different data. Often the solution works with one kind of input data but doesn't work with others. Check the «Tests» tab to figure this out, you can find hints at the error output.

My code is different from the teacher's one 🤔

It's fine. 🙆 One task in programming can be solved in many different ways. If your code passed all tests, it complies with the task conditions.

In some rare cases, the solution may be adjusted to the tests, but this can be seen immediately.

I've read the lessons but nothing is clear 🙄

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