====== IsError(expression) ======
Category:  Logical function

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=====Description=====
This function returns TRUE if the result of //expression// is an error.  Otherwise, it returns FALSE.

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=====Arguments=====
^Argument^Type^Description^
|expression|Expression|Any expression that could potentially result in an error.|
**Return value type:** Boolean (TRUE/FALSE)

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=====Examples=====

  iserror( 100 / [FieldA] ) //Returns FALSE if [FieldA] is 200

  iserror( 100 / [FieldA] ) //Returns TRUE if [FieldA] is 0  (Error - division by zero)

  iserror( left([FieldA], 'ZZZ') ) //Returns TRUE (Error - Inappropriate parameter)


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===== See also =====
  * [[syntax:functions:iferror|IfError(expressions, expression2)]]
  * [[syntax:functions:isboolean|IsBoolean(expression)]]
  * [[syntax:functions:isempty|IsEmpty(expression)]]
  * [[syntax:functions:isinteger|IsInteger(expression)]]
  * [[syntax:functions:isnumber|IsNumber(expression)]]
  * [[syntax:functions:isnumeric|IsNumeric(expression)]]
  * [[syntax:functions:istext|IsText(expression)]]