You can solve this problem by adding additional parentheses. This time, the * and / are in the same expression and there are no parentheses. Is there any violation of the standard here? In previous exercise you probably did this: console.log(70 * (3 + 4) / (8 + 2)) This code does not violate the rules, and the linter will "say nothing" as it were. In the last lesson we recognized that such an abundance of numbers and symbols may be confusing and we decided to add parentheses purely for the sake of readability: console.log(((8 / 2) + 5) - (-3 / 2)) // => 10.5
no-mixed-operators – You can't write code that contains multiple operations in a single expression with no explicit parentheses separation. space-infix-ops – No space between operator and operands. Linter won't be happy about it, because several rules have been violated: Take a look at the example from the previous lesson: console.log(8/2+5 -3 / 2) // => 10.5 For example, ESLint analyzes JavaScript code. They ensure the code meets the standards. In any programming language, there are utilities known as linters. The most common standard in JavaScript is AirBnb. Special sets of rules - standards - describe different aspects of code writing. The program code should be organized in a certain way so that it is sufficiently clear and easy to maintain. You can download the ValidateJavaScript source code on GitHub.Since we've learned to write simple programs, let's talk about the very process of writing. Zakas, and is being maintained by CircleCell. ValidateJavaScript has been built using ESLint, the open-source JavaScript linting utility created by Nicholas C. 
Have cleaner, safer and maintainable code. Catch fundamental errors (we all make them!). The longer you work on a project, the larger your codebase will become, so by validating your JavaScript code regularly you will be able to: Copy and paste or directly input your code into the editor above, click the 'Find & Fix Errors' button, and the tool will parse your code and list all errors allowing you to fix them systematically. ValidateJavaScript is an online validating (or linting) tool that will automatically find basic errors and help prevent potentially destructive bugs in JavaScript and JSX (React.js) code.
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