Web Development 201 Practice Test 2025 – Complete Exam Prep

The concept of prompt and alert serves different functions in JavaScript, particularly in the context of user interaction within a web browser.

The function that prompts users for input—prompt—displays a dialog box that contains a message and an input field for the user to enter a response. When the user submits their input, the prompt function returns the value entered in that input field. If the user cancels the prompt, it will return null. This ability to capture user input is what distinguishes prompt from alert.

On the other hand, the alert function is designed solely to deliver a message to the user and will not return any value. It only shows information and requires the user to acknowledge it by clicking an "OK" button, and it does not involve any user input.

Understanding this difference is key to utilizing these functions effectively in web development. Therefore, the statement that prompt will return a value, while alert does not, accurately describes this distinction.