Create a function that can generate array with only prime numbers

Question

I was told in a JavaScript interview to create a function getPrime(n) to generate an array with only primitive numbers in it. The number in array has to be between 0 and n. How to write it correctly?

Answer 1

function getPrime(n){
    arr=[];
    count=0;

    for(var j=1;j<=n;j++){
        for(var i=1;i<=j;i++){
            if(j%i==0){
                count++;   
            }
        }
        if(j==1){
            arr.push(j);
        }
        if(count==2){
            arr.push(j);
        }
    count=0;
    }
return arr;
}