function warn(x) {
if (Number.isSafeInteger(x)) {
return 'Precision safe.';
}
return 'Precision may be lost!';
}
console.log(warn(Math.pow(2, 53)));
// Expected output: "Precision may be lost!"
console.log(warn(Math.pow(2, 53) - 1));
// Expected output: "Precision safe."