The
isNaN() method of
Java Double class is a built in method in Java returns true if this Double value or the specified double value is Not-a-Number (NaN), or false otherwise.
Syntax:
public boolean isNaN()
or
public static boolean isNaN(double val)
Parameters: The function accepts a single parameter
val which specifies the value to be checked when called directly with the Double class as static method. The parameter is not required when the method is used as instance method.
Return Value: It returns
true if the val is
NaN else it return
false.
Below programs illustrate
isNaN() method in Java:
Program 1:
Output:
Infinity is not NaN
NaN is NaN
Program 2:
