Microsoft® JScript®
typeof Operator
 Language Reference 
Version 1 

See Also


Description
Returns a string that identifies the data type of an expression.
Syntax
typeof [ ( ] expression [ ) ] ;

The expression argument is any expression for which type information is sought.

Remarks
The typeof operator returns type information as a string. There are six possible values that typeof returns: "number," "string," "boolean," "object," "function," and "undefined."

The parentheses are optional in the typeof syntax.


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