isNaN 2020-3-30

# 输出是什么

const name = "Lydia Hallie";
const age = 21;

console.log(Number.isNaN(name));
console.log(Number.isNaN(age));

console.log(isNaN(name));
console.log(isNaN(age));

# 参考

输出是什么
参考