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Microsoft® JScript™ isNaN Function |
| Language Reference | | Version 1 | |
Determines whether a value is the reserved value NaN (not a number).
isNaN(numvalue)
The numvalue argument is the value to be tested against NaN.
The isNaN function returns true if the value is NaN, and false otherwise. You typically use this function to test return values from the parseInt and parseFloat functions.
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