The for...in loop is a powerful tool that allows us to iterate over the properties of an object. It consists of three components: key declaration, object reference, and property iteration. Let's see it in action with some examples:
In this example, we declare the `key` variable to represent each property name (key) of the `person` object. The for...in loop iterates over each property, and we can access both the property name and its corresponding value using the `key` variable.
In this new example, we have an object named `building` with different properties. The for...in loop allows us to access each property name (key) of the `building` object and retrieve its corresponding value dynamically.