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

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

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

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=====Examples=====

  isnumber(123) //Returns TRUE

  isnumber("It's a number!") //Returns FALSE

  isnumber(100/3) //Returns TRUE

  isnumber([FieldA]) //Returns FALSE (where [FieldA] is empty)


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===== See also =====
  * [[syntax:functions:isboolean|IsBoolean(expression)]]
  * [[syntax:functions:isempty|IsEmpty(expression)]]
  * [[syntax:functions:iserror|IsError(expression)]]
  * [[syntax:functions:isinteger|IsInteger(expression)]]
  * [[syntax:functions:isnumeric|IsNumeric(expression)]]
  * [[syntax:functions:istext|IsText(expression)]]