What happens when you run this code?

if (true) {
  var x = 5;  const y = 6;  let z = 7;}
console.log(x + y + z);

What happens when you run this code?

if (true) {
  var x = 5;  const y = 6;  let z = 7;}
console.log(x + y + z);

题目类型: 技术面试题

这是一道技术面试题，常见于澳洲IT公司面试中。

难度: medium

分类: JavaScript

标签: JavaScript

参考答案摘要

[ ] It will throw a ReferenceError about x . It will throw a ReferenceError about x . [ ] It will print 18 . It will print 18 . [ ] It will print undefined . It will print undefined . [x] It will thro...

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