Up to three variables may be given a range of values for the summation by means of FOR statements. Such an expression may be entered by continuing it on the next line. ABC will print another question mark and the remainder of the line may then be entered. The most recent version of ABC contains several new numerical modes. Input integers are taken as octal rather than decimal, and can contain up to 12 significant digits before overflow occurs.
Integers are output in octal form as shown below.
In this mode, input integers are taken to be decimal rather than octal. When you type in a floating point number, its octal value is used to fill the first word of a double precision floating point number. The maximum number of variables allowed is 50. This command allows you to execute files containing ABC statements. The printing of variable assignments is suppressed when executing statements in files, as shown above.