DEFSTR                   Define Variable(s) as String

 DEFSTR letter[-letter] [,letter [-letter]]...

    Declares one or more variables to be of type string.

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      Notes:    All variable names beginning with any of the specified
                letters (case-insensitive) will be strings, unless a type-
                identifier character (%, %, #, or !) is used to override
                the DEFSTR declaration.

                The DEFSTR declaration must be read by the compiler before
                any statements in which the declared variables are
                assigned or used. The compiler reads from the beginning to
                the end of the source file, without regard for execution
                path. Therefore, you cannot avoid a DEFSTR declaration by
                directing the execution path around it.

                By default, if a variable has not been previously defined
                and does not end with a type identifier (for example, %,
                #), the variable is assigned a type of single precision
                floating point.