Hi am new to javascript and would like to know what I did wrong

Question

var User = prompt('Pick Temp Username');

//Page always shows the Null message even if the user put something in the box

if (User =! null){

document.write('User didnt put username');

}

else {

document.write('Welcome, ' + User + ', I hope you enjoy your stay!');

}

Answer 1

The problem here is with if (User =! null). "!" is the NOT operator. It will return the opposite of what you give it. "=" is the assignment operator. It sets something equal to something else. In the order you have it, you're setting "User" equal to the opposite of null - which is true. To prove that, check the value of "User" after that line.

You'll want to use "!=" or "!==" (do some research on the difference). These read as "not equal to".