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# Double.IsPositiveInfinity() Method in C#

• Last Updated : 13 Feb, 2019

In C#, Double.IsPositiveInfinity() is a Double struct method. This method is used to check whether a specified value evaluates to positive infinity or not. In some floating point operation, it is possible to obtain a result that is positive infinity. For Example: If any positive value is divided by zero, it results in positive infinity.

Syntax: public static bool IsPositiveInfinity (double d);

Parameter:
d: It is a double-precision floating-point number of type System.Double.

Return Type: This function return a Boolean value True, if specified value evaluates to positive infinity, otherwise return False.

Example:

```Input  : d = 10 / 0.0
Output : True

Input  : d =  7.997e307 + 9.985e307;
Output : True
```

Code: To demonstrate the Double.IsPositiveInfinity(Double) Method

 `// C# program to illustrate the``// Double.IsPositiveInfinity() Method``using` `System;`` ` `class` `GFG {`` ` `    ``// Main method``    ``static` `public` `void` `Main()``    ``{`` ` `        ``// Dividing a Positive number by zero``        ``// results in positive infinity.`` ` `        ``// Dividing a number directly by 0``        ``// produces an error``        ``// So 0 is stored in a variable first`` ` `        ``double` `zero = 0.0;``        ``double` `value = 10.0;``        ``double` `result = value / zero;`` ` `        ``// Printing result``        ``Console.WriteLine(result);`` ` `        ``// Check result using IsPositiveInfinity() Method``        ``Console.WriteLine(Double.IsPositiveInfinity(result));`` ` `        ``// Floating point operation that exceeds``        ``// Double.MaxValue (i.e 1.7976931348623157E+308)``        ``// is Positive Infinity`` ` `        ``result = 7.997e307 + 9.985e307;`` ` `        ``// Printing result``        ``Console.WriteLine(result);`` ` `        ``// Check result using IsPositiveInfinity() Method``        ``Console.WriteLine(Double.IsPositiveInfinity(result));``    ``}``}`

Note:

• Floating-point operation return Infinity (Positive Infinity) or -Infinity (Negative Infinity) to indicate an overflow condition.
• The result of any floating point operation that exceeds Double.MaxValue (i.e 1.7976931348623157E+308 ) is considered as Positive Infinity.

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