function untilOne(n) { if (n <= 0 || !isFinite(n)) { return -1; } let x = n; let i = 0; while (Math.sqrt(x) !== 1) { x = Math.sqrt(x); i++; } return i; } for (let i = 0; i <= 55; i++) { console.log(`${i} : ${untilOne(i)} `); }