BREAK(1) User Commands BREAK(1)
NAME
break, continue - shell built-in functions to escape from or advance
within a controlling while, for, foreach, or until loop
SYNOPSIS
sh break [
n]
continue [
n]
csh break continue ksh *break [
n]
*continue [
n]
ksh93 +break [
n]
+continue [
n]
DESCRIPTION
sh The
break utility exits from the enclosing
for or
while loop, if any. If
n is specified, break
n levels.
The
continue utility resumes the next iteration of the enclosing
for or
while loop. If
n is specified, resume at the
n-th enclosing loop.
csh The
break utility resumes execution after the
end of the nearest
enclosing
foreach or
while loop. The remaining commands on the current
line are executed. This allows multilevel breaks to be written as a list
of
break commands, all on one line.
The
continue utility continues execution of the next iteration of the
nearest enclosing
while or
foreach loop.
ksh The
break utility exits from the enclosed
for,
while,
until, or
select loop, if any. If
n is specified, then
break n levels. If
n is greater
than the number of enclosing loops, the outermost enclosing loop shall be
exited.
The
continue utility resumes the next iteration of the enclosed
for,
while,
until, or
select loop. If
n is specified then resume at the
n-th
enclosed loop. If
n is greater than the number of enclosing loops, the
outermost enclosing loop shall be used.
On this manual page,
ksh(1) commands that are preceded by one or two *
(asterisks) are treated specially in the following ways:
1. Variable assignment lists preceding the command remain in
effect when the command completes.
2.
I/O redirections are processed after variable assignments.
3. Errors cause a script that contains them to abort.
4. Words that follow a command preceded by
** that are in the
format of a variable assignment are expanded with the same
rules as a variable assignment. This means that tilde
substitution is performed after the
= sign, and also that word
splitting and file name generation are not performed.
ksh93 break is a shell special built-in that exits the smallest enclosing
for,
select,
while, or
until loop. It also exits the
nth enclosing loop if
n is specified. Execution continues at the command following the loop or
loops.
If
n is specified, it must be a positive integer
>=1. If
n is larger than
the number of enclosing loops, the last enclosing loop is exited.
continue is a shell special built-in that continues execution at the top
of the smallest enclosing
for,
select,
while, or
until loop, if any; or
of the top of the
nth enclosing loop if n is specified.
If
n is specified, it must be a positive integer
>=1. If
n is larger than
the number of enclosing loops, the last enclosing loop is used.
On this manual page,
ksh93(1) commands that are preceded by one or two
+ symbols are special built-in commands and are treated the following ways:
1. Variable assignment lists preceding the command remain in
effect when the command completes.
2. I/O redirections are processed after variable assignments.
3. Errors cause a script that contains them to abort.
4. Built-in commands are not valid function names.
5. Words following a command preceded by
++ that are in the
format of a variable assignment are expanded with rules as a
variable assignment. This means that tilde substitution is
performed after the
= sign and field splitting and file name
generation are not performed.
SEE ALSO
csh(1),
exit(1),
ksh(1),
ksh93(1),
sh(1),
attributes(5) April 8, 2008
BREAK(1)