In practice, the browser provides ways to stop such loops, and in server-side JavaScript, we can kill the process. Any expression or variable can be a loop condition, not just comparisons: the condition is evaluated and converted to a boolean by while. For instance, a shorter way to write while (i != 0) is while (i):

Tutorial; The JavaScript language; JavaScript Fundamentals; November 1, 2021. Hello, world! This part of the tutorial is about core JavaScript, the language itself. But we need a working environment to run our scripts and, since this book is online, the browser is a good choice. We’ll keep the amount of browser-specific commands (like alert) to a minimum so that you don’t spend time on ...

A property has a key (also known as “name” or “identifier”) before the colon ":" and a value to the right of it.. In the user object, there are two properties:. The first property has the name "name" and the value "John".; The second one has the name "age" and the value 30.; The resulting user object can be imagined as a cabinet with two signed files labeled “name” and “age”.

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