6. Comment écrivez-vous « Hello World » dans une boîte d’alerte?A msg("Hello World");B alert("Hello World");C msgBox("Hello World");D alertBox("Hello World");

To achieve the task of displaying "Hello World" in an alert box using JavaScript, the correct syntax must be followed. In this case, the proper method is to use the alert() function.

Analyzing the Options:

1. A msg("Hello World"); - This is incorrect because there is no standard JavaScript function named msg.
2. B alert("Hello World"); - This is correct. The alert() function is specifically designed to create a pop-up alert box with a message.
3. C msgBox("Hello World"); - This is also incorrect as msgBox is not a defined function in JavaScript.
4. D alertBox("Hello World"); - This is wrong as well; alertBox is not a standard JavaScript function.

Conclusion

The only correct option is: B alert("Hello World");

This command will display a pop-up alert containing the text "Hello World".