Epson Printer Interface Cartridge Operation Manual page 63

Notice that the first line stores the whole graphics command in a
single string variable. In order to do this you must put plus signs
between the elements of the command. Once you have done this at
the beginning of the program, each time you enter LPRINT G$; you
have issued the graphics command. Lines 20 and 30 do the same thing
with the data used in this program. As you can see, the use of string
variables saves some typing even in this short program. In a long
program it can save you much more time and effort.
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