$isdigit
Tests if a character string contains only digits.
Syntax
$isdigit(string)
Parameters
| string | a character string or an expression that evaluates to a character string |
Return Value
1-character binary string. Evaluates to 1 ($True) if string meets the validation test; otherwise, evaluates to 0 ($False).
Comments
This function tests if a particular character string is all digits.
Example
$isdigit(“0123”)
Evaluates to $True.
$isdigit(2.3)
Evaluates to $False.
See Also