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$isnumber
Tests if an expression produces a valid number after its evaluation.
Syntax
$isnumber(expression)Parameters
| expression | a character string or an expression that evaluates to a character string |
Return Value
Returns 1 ($True) if string meets the validation test; otherwise, returns 0 ($False).
Example
$isnumber(2+3)
$isnumber($trim(" 3.5"))Evaluates to $True.
$isnumber($trim(LastName))
Evaluates to $False.
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