Double.IsNaN() Method in C#
In C#, Double.IsNaN() is a Double struct method. This method is used to check whether the specified value is not a number (NaN).
Syntax: public static bool IsNaN (double d);
Parameter:
d: It is a double-precision floating-point number of type System.Double
Return Type: This function returns a Boolean value i.e. True, if specified value is not a number(NaN), otherwise returns False.
Example:
Input : d = 0.0 / 0.0 Output : True Input : d = 1.734 Output : False
Code: To demonstrate the Double.IsNaN(Double) method.
// C# code to demonstrate // Double.IsNaN(Double) method using System; class GFG { // Main Method public static void Main(String[] args) { // first example Double f1 = 1.0 / 0.0; bool res = Double.IsNaN(f1); // printing the output if (res) Console.WriteLine(f1 + " is NaN" ); else Console.WriteLine(f1 + " is not NaN" ); // second example double f2 = 0.0 / 0.0; bool res1 = Double.IsNaN(f2); // printing the output if (res1) Console.WriteLine(f2 + " is NaN" ); else Console.WriteLine(f2 + " is not NaN" ); } } |
Output:
Infinity is not NaN NaN is NaN
Note:
- If we divide any value by 0 directly, the Compiler will show an error. So, in the above example, 0 is stored in a variable first.
- Every floating point operation returns a NaN to show that the result of the operation is undefined.
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