Navigator 3.0
Number.NaN
Number.NaN is a special value that indicates that the result of some arithmetic operation (such as division by zero) or mathematical function is "Not-a-Number." parseInt() and parseFloat() return this value when they cannot parse the specified string, and you might use Number.NaN in a similar way to indicate an error condition for some function that normally returns a valid number.
JavaScript prints the Number.NaN value as NaN. Note that the NaN value always compares unequal to any other number, including NaN itself. Thus, you cannot check for the Not-a-Number value by comparing to Number.NaN. Use the isNaN() function instead.
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![]() o List host: MIT, Site host massmind.org, Top posters @none found - Page Editors: James Newton, David Cary, and YOU! * Roman Black of Black Robotics donates from sales of Linistep stepper controller kits. * Ashley Roll of Digital Nemesis donates from sales of RCL-1 RS232 to TTL converters. * Monthly Subscribers: Gregg Rew. on-going support is MOST appreciated! * Contributors: Richard Seriani, Sr. |
Ashley Roll has put together a really nice little unit here. Leave off the MAX232 and keep these handy for the few times you need true RS232! |
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