javascript Global isNaN( )
@March 15, 2008, 1:22 a.m.
| isNaN( ) | Firefox/Netscape/NN 2 IE 3 ECMA 1 |
isNaN(expression) | |
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Returns a Boolean value of true if the expression passed as a parameter does not evaluate to a numeric value. Any expression that evaluates to NaN (such as performing parseInt( ) on a string that does not begin with a numeral) causes the isNaN( ) method to return true. |
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| Parameters | |
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| Returned Value | |
Boolean value: true | false. |
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