Skip to main content

Is Not a Number

Overview​

This function checks if a parameter is not a number:

  • Returns true if the parameter is not a number.
  • Returns false if the parameter is a number.

CHelper.Math.IsNaN(Parameter)

The parameter of this function can be defined as an XPath, variable, or number.

Considerations​

  • The supported attribute types to use as input XPath parameter (or Xpaths stored in variables) are: integer, currency, float, real.

Example​

Suppose you want to evaluate if the parameters to be used in a Math function are numbers in order to avoid errors or incoherent results. To do so you can use the IsNaN function:

Math26

//Evaluate if of the parameters to be used in the average function are numbers

Number1IsNotaNumber=CHelper.Math.IsNaN(<Product.Price1>);

Number2IsNotaNumber=CHelper.Math.IsNaN(<Product.Price2>);



if (Number1IsNotaNumber==true || Number1IsNotaNumber==true)

{

//If not show an error message

CHelper.ThrowValidationError("The parameters of the Average function must be numbers");

}else{

//If so, apply the math function

CHelper.Math.Average([<Product.Price1>,<Product.Price2>]);

}