boolean isNaN()
static boolean isNaN(float v)
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Description:
isNaN() method:
Returns true if this Float value is Not-a-Number (NaN).
isNaN(float v) method:
Returns true if the specified number is the special Not-a-Number (NaN) value.
Example
if (Float.isNaN(20.23465f))
Logger.log("the specified number is NaN");
The example above returns true if the value is not a number.