isNaN
Returns true if the specified number is a Not-a-Number (NaN) value, false otherwise.
Return
true if the value of the argument is NaN; false otherwise.
Parameters
v
the value to be tested.
Returns true if the specified number is a Not-a-Number (NaN) value, false otherwise.
This corresponds to the isNaN operation defined in IEEE 754.
Return
true if the argument is NaN; false otherwise.
Parameters
v
the value to be tested.