2019-05-19_check_prime_number

function checkPrime(x){
x = prompt("Enter the number to check", -3.2);

if(isNaN(x)){ alert("Not a number"); return; }
if(x<0){ alert("Negative number"); return; }
if(x != parseInt(x)){ alert("Not an integer"); return; }


var isPrime = true;

if(x==0 || x==1){ isPrime = false;}

for(i=2; i<x/2; i++){
    if((x%i) == 0){
        isPrime = false;
    }
}
alert(isPrime);
return;

}

checkPrime();