$isnumber
Tests if an expression produces a valid number after its evaluation.
Syntax
$isnumber(expression)
Parameters
| string | a character string or an expression that evaluates to a character string |
Return Value
1-character binary string. Evaluates to 1 ($True) if string meets the validation test; otherwise, evaluates to 0 ($False).
Comments
This function tests if a particular character string is a valid number.
Example
$isnumber(2+3)
Evaluates to $True.
$isnumber($trim(LastName))
Evaluates to $False.
See Also