Not (!) operator , how does it really work, secondly how does this method account for prime 5 if n is set to limit of 10?

Question

this code is used to find prime numbers
function showPrime(n){
for( let x=2; x<n; x++){
if( !isPrime(x) ) continue;
document.write(x);
}
}
function isPrime(n){
for( let x=2; x<n; x++){
if(n%x==0) return false;
}
return true;
}
//n%x let's say n is 10 and x is 5. remainder is 0 ....hence false is returned but 5 is prime ,not sure on this. lastly the return values are being stored in !isPrime(x)...?

Answer 1

When you write n%x you test whether n is divisible by x, like 10%5 == 0 --> You test here if 10 is a prime, not 5. If it returns false because of 10%5 == 0, it means 10 isn't a prime, n has to be the tested number. Hope you understand what I want to say😊