What is the difference between null and undefined? When do you get each one?

What is the difference between null and undefined? When do you get each one?

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: hard

标签: interviewbit, javascript, topic-specific, frontend

参考答案摘要

undefined means a variable exists but has no value assigned yet. null means the value is intentionally set to nothing. JavaScript usually gives undefined automatically. Developers usually assign null ...

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