count defines the next available q series variables, from the code count is 2 so q8, q9 are available. to extract variables of q series I'm printing as below
let inputdata = {count:{value:2}, q8:{value:'John'}, q9:{value:'Siva'}};
for (let index = 1; index <= inputdata.count.value; index++) {
let pos = 7+index;
let q = `inputdata.q` + pos;
console.log("Vals: ", q.value);
}