What is the difference between halt break exit in Pascal language programming?

halt: Exit the program.

exit: exit the process and function. If you are in the main program, the effect is the same as HALT.

exit is to exit the block. If it is used in a process, exit the process (the sub-process exits the sub-process), and exit directly in the main program.

break is to jump out of a loop, for example, the statement for i:=1 to 10 do begin for j:=1 to 10 do if i=j then break; write(j);end;, when i and j are both equal to 1, the condition is satisfied, and for j: jumps out

1 to 10 do ……, just write the final value of j. In this way, the algorithm can be optimized, eliminating the 9 loops of the next j.

halt is the most arbitrary kind of withdrawal. No matter what program is executed, it is directly truncated, and the program is closed and returned to the compilation window, which is generally used to judge the timely exit after the endless loop. For example, the statement begin for i:

1 to 1 do halt;writeln('a');end;, the output item is empty because the program was exited before the output statement.

halt: Exit the entire program, both in the process and in the main program.

exit: exit the process and function. If you are in the main program, the effect is the same as HALT. That's right.

break: Jumps out of the loop.

halt: Exit all programs (main program, subprogram).

exit: exit the current program block (in the main program, exit the main program; In the subroutine, exit the subroutine).

break: exits the current loop.

There is no return

Enter exit directly; or halt;

halt: Exit the program.

exit: exit the process and function. If you are in the main program, the effect is the same as HALT.

halt: Exit the program. (Don't forget to close the file before using it) exit: exit the procedure or function in the procedure or function, which is equivalent to halt in the main program, and exit(i) in the function; It means assigning the value of i to the function and exiting the function.

break: exits the for loop.

continue: skips the execution of the for loop.

Only the current loop can be jumped, that is to say one.

As far as the current cycle ends.

So there is a standing Boolean variable that is used to exit the outer loop.

In the case of bash, run "bash" to make sure your environment is bash and "help break."", and then run "help exit" to see the help, and you will know the difference.

Break is mainly used to exit from a loop, similar to the break statement in C.

exit is used to exit the shell, and if you run exit in a Linux command-line window, the window will close and exit. In a shell script, when the script is run to exit, the entire script terminal is run, and the script runs.

Forehead! break primitive, broke in the past tense, broken past perfect tense, breaking (......I don't remember, it seems that break is an imperative sentence, and there is no current tense) Forgive me, I have been in contact with English for five or six years.

Break verb primitive bronze past tense broken past participle breaking present participle.

Present continuous tense Past tense primitive.

Prototype. Past tense. Past continuous tense. Present participle.

halt hangs, the program executes this statement and is interrupted, mainly used for debugging the program, easy to check the error, exit exit, when the program executes this statement, the program execution is terminated, and the state before the program is executed.

Break is mainly used in the loop statement body, exiting the sentence body, and executing the statement outside the sentence body.

continue is used in the loop statement to end other statements in the loop body, return the judgment statement of the loop body, and continue the execution of the next loop body.

halt--- ends the entire program (including subroutines and the main program) exits --- ends the current program block (or the subroutine if it is a subroutine; In the main program, end the main program).

break--- exits the current loop and returns to the previous loop.

continue--- skips this loop and goes straight to the next loop.

halt: ends the entire program (both the main program and the subroutine) exit: ends the current program block.

break: ends the current loop.

For example: for i:=1 to 99 do

for i:=1 to 55 do break only ends j this loop.

continue: ends the loop.

You can use goto but it's better not to use it, it's always inexplicable and wrong. If you loop, you will continue and jump to the front. You just have to backtrack the value a bit. It seems that all kinds of oj** will report errors when using goto, at least usaco is.

goto label statement designator.

However, generally speaking, using goto more is a bad programming habit, and it is better to use it sparingly.

It can be used when jumping out of multiple loops.

1 All exit() is a function.

When you end a process, it will delete the memory space used by the process, and at the same time return the error message to the parent process, where the wait system call will receive this return message.

return returns the value of the function, which is the keyword.

In the main function we usually use return (0); This way returns a value.

But this is limited to non-void cases, i.e. void main().

exit() is usually used in subroutines to terminate programs, after which the program automatically ends the skipping operating system.

However, if exit is used in main, the value returned is valid regardless of whether main is defined as void or not, and exit does not need to be of type, exit(1) is equivalent to return(1).

exit(0);Exit normally.

A non-0 is an abnormal exit.

The numbers 0, 1, and -1 are written into the environment variable errorlevel, which can be used by other programs to determine the end state of the program.

Generally, 0 is a normal pushout, and other numbers are abnormal, and the corresponding error can be specified by yourself.

return is only used in the function body, returning the value of the number behind return to the calling function to continue to execute, and exit is a system function that can directly end the whole program, and the parameters behind it have a fixed meaning, 0, 1 and the like are defined function parameters.

return is the end of the function call when the function call is either returned with a value or returned directly.

exit is the direct end of the main program, exit(0) is the normal end, and exit(1) is the abnormal end.

return is mainly the meaning of return, the verb.

exit is mainly export-only, emergency exit, and more nouns.

exit()

is a function that ends a process, which will remove the memory space used by the process, and at the same time return the error message to the parent process, where the wait system call will receive this return message.

return returns the value of the function, which is the keyword.

I checked the jdk documentation: status) is to abort the current virtual machine, i.e. a mandatory rollout procedure.

That parameter is the status code, 0 indicates a normal exit of the program, and other values indicate an abnormal exit.

return is a keyword in a function that returns a variable.

return is used for function returns.

exit is used to exit the program.

void main() doesn't exist at all and is not a C standard.