function typeOfNaN(x) {
if (Number.isNaN(x)) {
return 'Number NaN';
}
if (isNaN(x)) {
return 'NaN';
}
}
console.log(typeOfNaN('100F'));
// expected output: "NaN"
console.log(typeOfNaN(NaN));
// expected output: "Number NaN"
function typeOfNaN(x) { if (Number.isNaN(x)) { return 'Number NaN'; } if (isNaN(x)) { return 'NaN'; }}console.log(typeOfNaN('100F'));// expected output: "NaN"console.log(typeOfNaN(NaN));// expected output: "Number NaN"