JS Odd Even # Decision Maker SRC

<script>
var num=(prompt('Enter # Start:'));
var num1=(prompt('Enter # Stop:'));
while(num<num1){
num++;
if(num!=num1){
var res=num%2;
var res2=num1%3;
if(res==true){
document.writeln(num+' Odd!!');
}else{
document.writeln(num+' Even!!')
}
}
}
</script>