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<< Click to Display Table of Contents >> Navigation: ThinBASIC Core Language > BuiltIn Functions > String functions > IsNull |
Description
Returns %TRUE if String Expression is equal to an empty string
%FALSE otherwise.
Syntax
n = IsNull(StringExpression)
Returns
Number: %TRUE or %FALSE
Parameters
Name |
Type |
Optional |
Meaning |
StringExpression |
String |
No |
String to be checked |
Remarks
This function is like: StringExpression = ""
Added to make source code more expressive and easy to learn
Restrictions
See also
Examples
Script example