How to write a JavaScript program to find prime numbers between given range

Question

eg. find all prime numbers between 212-690 using JavaScript

Answer 1

https://gist.github.com/s22su/fdd69d441983e122176f

Answer 2

Won't do it for you but will give you a nudge.
1. if you want to look at every number in a range you probably want a loop of some sort that starts and ends where the range does.
2. how do you know if a number is prime or not? test each loop iteration accordingly.