VERIFY function

Purpose: VERIFY returns TRUE if every character in StrToTest$ is in ValidCharacters$. Otherwise, FALSE is returned.


 Syntax:

 RetVal = VERIFY(StrToTest$, ValidCharacters$)

 Parameters:

  • RetVal TRUE if every character in StrToTest$ is in ValidCharacters$, otherwise FALSE.
  • StrToTest$ String literal or variable to be checked for validity.
  • ValidCharacters$ String literal or variable against which StrToTest$ is checked.

Example:


 DIM RetVal

 RetVal = VERIFY("+135.79" , "eE+-.0123456789" ): PRINT i ' TRUE
 RetVal = VERIFY("-135.79" , "eE+-.0123456789" ): PRINT i ' TRUE
 RetVal = VERIFY("_135.79" , "eE+-.0123456789" ): PRINT i ' FALSE