const valueSet = new Set();
for(let i = 0; i < 10000; i++) {
valueSet.add(i);
}
const str = Array.from(valueSet).join(' ')
const str = [...valueSet].join(' ')
const arr = []
for(const value of valueSet) {
arr.push(value)
}
const str = arr.join(' ')
let str = ''
for(const value of valueSet) {
str += value + ' '
}
str = str.substring(0, str.length - 1)