How to make the situation true JAVASCRIPT

I don't know what is the missing code here it's giving me a headache because of the conditional statement.

Add the missing codes so that the condition below will evaluate to TRUE and print “it works!” in the console.

if (num == 100 && num== 200 && num==300) {
    document.write('it works!');
} else {
    document.write('it doesnt');
}

Answer

You need to use logical OR ||, because with logical AND && the condition is never true, if you take the same value of num.

if (num == 100 || num== 200 || num == 300) {

But in Javascript everything is possible, like: Can (a== 1 && a ==2 && a==3) ever evaluate to true?