.ISEMPTY(expr$)
The .ISEMPTY() function returns a boolean value (.TRUE or .FALSE) depending on whether the string or unformatted expression is empty, where "empty" is defined as meeting one of the following conditions:
•If the expression is .NULL, i.e. if .ISNULL(expr$) returns .TRUE
•In the case of a string expression, if expr$ = "", i.e. if it contains zero or more blanks up to the first null, and nothing more.
•In the case of an unformatted variable or expression, if it contains only null bytes.
Also See
History
2023 August, A-Shell 6.5.1742: Function added to A-Shell.
