View Single Post
Jun28-11, 04:48 PM
Sci Advisor
PF Gold
Hurkyl's Avatar
P: 16,099
One of the ideals of writing a program is that it should be self-documenting. A WHILE loop or a FOR loop are somewhat more descriptive than the equivalent construct built out of GOTO and IF-THEN statements.

Most commonly needed ways to control the flow of your program can be more concisely and clearly described via methods without invoking a GOTO statement. Many of the exceptions can be rearranged into a simpler program that doesn't use GOTO.

A lot of the GOTO hate is unwarranted, however. It's like the pirates vs global warming thing -- once upon a time GOTO was more or less all that was available, and people frequently wrote spaghetti* code. So people blamed GOTO as actually being the cause, rather than the lack of options simply being correlated with programming attitudes of the time.

And, of course, there is also some naivety of the form "if we forbid GOTO, then people can't write spaghetti code!" which motivates some more of the GOTO hate.

Sometimes, GOTO hate is taken to an extreme, turning into hate for BREAK, CONTINUE, some uses of exception handling, or even a RETURN that appears someplace other than the very last line of a function.

*: Spaghetti code is so named because it's not clear (or even impossible!) to tell what is happening in the program without paying very careful attention to the thread of execution as it winds through the program. Also, there is the subsequent problem that it is very difficult to modify the program.