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The pages on this site contain documentation for very old MS-DOS software, purely for historical purposes. If you're looking for up-to-date documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.

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SADD returns the address of a string as an offset from the current data
segment. It is typically used in mixed-language programming to obtain
far addresses before passing far strings to procedures written in other
languages. The offset is a 2-byte integer.
 
SADD (stringvariable$)
 
Usage Notes
    ■ SADD can be used with both near and far strings. To obtain the
      segment address of a far string, use the SSEG function.
    ■ In previous versions of BASIC, SADD was used only for near strings.
 
Important
    ■ Use this function with care because strings can move in the BASIC
      string space (storage area) at any time.
    ■ Do not add characters to the beginning or end of a string passed
      using SADD and LEN. Adding characters may cause BASIC to generate a
      run-time error.