how to use do while loop in JavaScript user name input

Published: 14 April 2023
on channel: Code Library

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In JavaScript, a "do-while" loop is a type of loop that allows you to repeatedly execute a block of code as long as a certain condition is true. The key difference between a "do-while" loop and other types of loops, such as a "for" loop or a "while" loop, is that the code block is executed at least once, regardless of whether the condition is true or false.

To use a "do-while" loop to get a valid username from a user in JavaScript

In this example, the prompt() function is used to display a dialog box to the user asking them to enter their username. The value entered by the user is stored in the username variable. The loop will continue to prompt for a username as long as the username variable is empty (i.e., falsy value), denoted by the !username condition. Once a non-empty value is entered by the user, the loop will exit, and the username will be stored in the username variable for further use in your JavaScript code.
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