Editing Dartmouth BASIC (section)

===Second Edition, CARDBASIC===
The Second Edition of BASIC (though not referred to as such at the time) only made minimal changes. Released in October 1964, it could start arrays at subscript 0 instead of 1 (useful for representing [[polynomial]]s) and added the semicolon, {{key|;}}, to the <code>PRINT</code> statement.{{sfn|Kurtz|1981|p=526}} Unlike later implementations where this left space between items, the semicolon advanced printing to the next multiple of three characters, which was useful for "packing" more numbers into a line of output than the existing comma separator.{{sfn|Man4}} The three-character size was a side-effect of the GE-235's 20-bit [[Word (computer architecture)|word size]], which stored three six-bit characters. Skipping to the next three-character column was accomplished simply by moving to the next word in memory.{{sfn|Kemeny|Kurtz|1985|p=24}}

The October version also included a separate definition for CARDBASIC, which was simply a version of BASIC for use on card-based workflows. CARDBASIC was almost identical to the interactive version, with the exception being that it did not include the zero-based arrays. More important to the language's future, CARDBASIC added the <code>MAT</code> commands that worked with numerical matrices. CARDBASIC was not developed further, as the entire idea of BASIC had been to be interactive.{{sfn|Kurtz|1981|p=526}}