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Therefore the line numbers weren't only needed as labels for the infamous GOTO, but indeed needed to tell the interpreter at what position in the program flow you are editing. Mostly cloudy in the evening then periods of showers after midnight. Low 38F. Winds SW at 5 to 10 mph. Overcast with rain showers at times. Low 39F. Winds SW at 5 to 10 mph. Overcast with showers at times.
This was a prototype, implemented as an experiment while the teletype-based interface that the language was being designed for was still being developed. That DTSS had a rudimentary IDE, which was nothing more than an interactive command line. The original editor for DOS was a wonderful utility called edlin. You could only edit a single line. Your program was stored in memory and you would type in single line commands to edit single lines. Before there was such a thing as a VDT , we old-timers programmed on punch cards.
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Writing a label takes more memory, first in the location, where that label is defined, then in any jump command. I'd guess it comes from assembler, where each instruction has an address which may be jumped to by another instruction. They originated in FORTRAN, from which BASIC was derived. However, in FORTRAN only lines referenced by other lines needed numbers. In BASIC they had a secondary use, which was to allow editing of specific lines. That's actually how I learned to program - editing by retyping.
High 51F. Winds SW at 10 to 20 mph. Light rain developing after midnight. Did you mean, that it was really hard to write in spite of the fact that it's so stupid? I think, it'd give a better idea of what kind of person you are. Fortran used both numeric target labels on the left (col 1-5) and left a reserved block on the right (73-80) for sequence or comment.
[PATTERN] Futurama 10 home 20 sweet 30 go to 10
Winds SW at 10 to 15 mph. Considerable cloudiness. Occasional rain showers later at night. Winds SSW at 10 to 15 mph. Low 32F. Winds W at 10 to 20 mph. Some light rain is likely.
Showers early becoming a steady light rain later in the day. High 48F. Winds SW at 10 to 15 mph. In Mother's day, there are also some programming language jokes.. I think the question was about languages where you had to type in the line numbers yourself. I agree line numbers that are displayed automatically by the editor are very useful .
Home 20 Sweet 30 GOTO 10
In many ways, the BASIC line numbers were similar to those sequence numbers. Mostly cloudy skies early will become partly cloudy later in the day. High 43F. Winds SW at 5 to 10 mph.
Fortran also qualifies. A few showers early with overcast skies late. Mostly cloudy skies. High 49F. Winds SSW at 5 to 10 mph. Steady light rain in the evening. Showers continuing late.
Print/export
Is so that a programmer can come back in later and add, say, a line 25 without having to redo all the numbers. The answer is already above. Paul Tomblin wrote it . QBasic was one of the first versions of BASIC not to require line numbers. It came with a program to remove unneeded line numbers from GW-BASIC code.
All you had was the command line. +1 - this is the right answer. The combination of line editor and immediate execution in the same environment was probably BASIC's most important contribution. Want to improve this question? Update the question so it focuses on one problem only by editing this post.
Low 42F. Winds S at 5 to 10 mph. It received more prominent vlog, blog, and print news coverage when Kevin Olson displayed the first ever American showing of ANSI art in a physical art gallery. Heck we could go nuts and read hex code that corrisponds to the ASCII codes of each of the characters, and read that out of a seperate data file.... VIEWIC is cool because "VIEWIC Identifies Ellipsis When It Can" contains ellipsis. Also, it's antecedent-contained ellipsis, so it forms another infinite loop. Back in the day you didn't have a 2 dimensional editor like emacs or vi.
Get exclusive offers by signing up to our mailing list. Enter your email address. Technically it would read HOME SWEET in an infinite loop.
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