What line of code causes this code segment to throw an error?

const lion = 1;let tiger = 2;var bear;++lion;bear += lion + tiger;tiger++;

What line of code causes this code segment to throw an error?

const lion = 1;let tiger = 2;var bear;++lion;bear += lion + tiger;tiger++;

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

[x] line 5, because lion cannot be reassigned a value line 5, because lion cannot be reassigned a value [ ] line 6, because the += operator cannot be used with the undefined variable bear line 6, beca...

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