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QWhat does the JavaScript "typeof" operator return for a variable of the "undefined" primitive data type?

ID: #21478 Data Types Introduction 124 views
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#21478Q ID
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Data Types IntroductionTopic
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  • A "number" ✔ ✖
  • B "undefined" ✔ ✖
  • C "string" ✔ ✖
  • D "boolean" ✔ ✖
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Explanation

The "typeof" operator in JavaScript returns the string "undefined" when applied to a variable of the "undefined" primitive data type. It is a tool for dynamically determining the type of a given variable.

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