what is the command to exit a loop in C?

[na_th_an]

see? more than 14,000 gotos on Linux source

The issue is not: "goto is bad", but "people don't know how to use goto properly".

Mind you.

[KingCheetah]

GOTO is evil???? Why?

Other ideas:

Make an exit variable:
If exit is 0 then the loop goes, but when it is 1, the loop exits.

If You need to exit in the middle of the loop, place an IF exit==0 before the unwanted code (Of course, dont forget to put that between the {})

If You have a FOR cycle, simply increase the counter to it's maximum, and the loop will exit.

Anyway, I sometimes use GOTO, but else I use these.

[Antoni Gual]

To exit a loop you can use whatever you want:

Code:

#define Go_Away_off_this_darn_loop exit

in C++ defines are evil so you should do something smarter..

[na_th_an]

GOTO is evil???? Why?

Other ideas:

Make an exit variable:
If exit is 0 then the loop goes, but when it is 1, the loop exits.

If You need to exit in the middle of the loop, place an IF exit==0 before the unwanted code (Of course, dont forget to put that between the {})

If You have a FOR cycle, simply increase the counter to it's maximum, and the loop will exit.

Anyway, I sometimes use GOTO, but else I use these.

yeah, there are workarounds. But goto is faster and straightforward. You can exit 27 nested loops/ifs/whends/cases/whatevers in a while. No need to do 27 checks.

[LooseCaboose]

The MINIX code I am working with has some funky goto code like this:

Code:

<In the kernel>
  rp->p_reg.pc = __sigreturn;
  rp->p_reg.npc = rp->p_reg.pc + 4;

<In the library>
  __sigreturn:
    ld [%sp + 96], %o0
    ...

It allows jumps to arbitary points in code (even to other functions) without causing a stack save, the __sigreturn function can then read info straight from the stack.

[na_th_an]

LooseCaboose is a genius. Listen to him. I am just to back him. Gotos are for really good, experienced programmers. They save time if used correctly. Processors are simple: they perform arithmetic operations, do memory accesses, and jump. Goto = jump. What's wrong?