| 2. 13. 1. The Typeof Operator |
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The typeof operator takes one parameter: the variable or value to check. |
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var sTemp = "test string";
alert(typeof sTemp);
alert(typeof 95);
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Calling typeof on a variable or value returns one of the following values: |
- "undefined" if the variable is of the Undefined type.
- "boolean" if the variable is of the Boolean type.
- "number" if the variable is of the Number type.
- "string" if the variable is of the String type.
- "object" if the variable is of a reference type or of the Null type.
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