Which of these is a valid variable name?

Which of these is a valid variable name?

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

[ ] 5thItem 5thItem [x] firstName firstName [ ] grand total grand total [ ] function [Reference coding conventions](https://www.w3schools.com/js/js_conventions.asp) function [Reference coding conventi...

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