isNaN  
  Returns true if the specified number is a Not-a-Number (NaN) value, false otherwise.
Since Kotlin
1.1Returns true if the specified number is a Not-a-Number (NaN) value, false otherwise.
Returns true if the specified number is a Not-a-Number (NaN) value, false otherwise.
Returns true if the specified number is a Not-a-Number (NaN) value, false otherwise.
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