Java.lang.Float.isNaN() Method

Description

The java.lang.Float.isNaN(float v) method returns true if the specified number is a Not-a-Number (NaN) value, else false.The argument v is the value to be tested.

Declaration

Following is the declaration for java.lang.Float.isNaN() method

public static boolean isNaN(float v)

Parameters

• v -- This is the value to be tested.

Return Value

This method returns true if the argument is NaN, else false.

Exception

• NA

Example

The following example shows the usage of java.lang.Float.isNaN() method.

package com.tutorialspoint;

import java.lang.*;

public class FloatDemo {

   public static void main(String[] args) {

     Float f1 = new Float(-1.0/0.0);
     Float f2 = new Float(0.0/0.0);
  
     // returns true if this Float value is a Not-a-Number(NaN), else false 
     System.out.println(f1 + " = " + f1.isNaN(f1));
  
     System.out.println(f2 + " = " + f2.isNaN(f2));
   }
}   

Let us compile and run the above program, this will produce the following result:

-Infinity = false
NaN = true