While loop for 2 different conditions

Question

I am trying to do 2 different while loop, as below:
var x=["andy","sam"];
var y=prompt("Who are you?");{
while(y!=x.find(n=>n==y)){
alert("You are not authorized!");
var y=prompt("Who are you?");
}

how about if i want to do the while loop also occur if the input is equal to null? if i do multiple while, it will loop over and over again. can anyone help me? Thank you.

Answer 1

Use || (logical or operator) for that.

var x=["andy","sam"];
var y=prompt("Who are you?");
while(y==""||y!=x.find(n=>n==y)){
alert("You are not authorized!");
y=prompt("Who are you?");
}
alert("Welcome!");

Other boolean operators: && (and), ! (not).