Hello

Sure! Here's a simple JavaScript code that prompts the user to enter their name and then displays a welcome message:

javascript
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1// Prompt the user to enter their name
2var name = prompt("Please enter your name:");
3
4// Display a welcome message
5console.log("Welcome, " + name + "!");

In this code, the prompt() function is used to display a dialog box that asks the user to enter their name. The entered name is then stored in a variable called name.

The console.log() function is used to display a welcome message in the browser's console, which includes the entered name.