$isnumber

Tests if a character string contains a valid number.

Syntax

$isnumber(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 a valid number.

Example

$isnumber(2+3)

Evaluates to $True.

$isnumber($trim(LastName))

Evaluates to $False.

 

Related Topics