The MID$ function returns part of a string (a substring).
The MID$ statement replaces part of a string variable with another string.
 
MID$(stringexpression$,start%[,length%])
MID$(stringvariable$,start%[,length%])=stringexpression$
 
    - stringexpression$    The string from which the MID$ function returns
                           a substring, or the replacement string used by the
                           MID$ statement. It can be any string expression.
    - start%               The position of the first character in the
                           substring being returned or replaced.
    - length%              The number of characters in the substring. If the
                           length is omitted, MID$ returns or replaces all
                           characters to the right of the start position.
    - stringvariable$      The string variable being modified by the MID$
                           statement.
 
Example:
    a$ = "Where is Paris?"
    PRINT MID$(a$, 10, 5)       'Output is:  Paris
    Text$ = "Paris, France"
    PRINT Text$                 'Output is:  Paris, France
    MID$(Text$, 8) = "Texas "
    PRINT Text$                 'Output is:  Paris, Texas
 
See Also    <LEFT$, RIGHT$>    <LEN>