function int2bin(n){
return (n >>> 0).toString(2);
}
function generateBinaryNumbers(len) {
for (let i = 1; i <= len; i++) {
console.log(int2bin(i))
}
}
let n = 15;
generateBinaryNumbers(n);
/*
run:
1
10
11
100
101
110
111
1000
1001
1010
1011
1100
1101
1110
1111
*/