Bash supports the following looping constructs.
Note that wherever you see a `;' in the description of a command's syntax, it may be replaced with one or more newlines.
until
until
command is:
until test-commands; do consequent-commands; doneExecute consequent-commands as long as test-commands has an exit status which is not zero. The return status is the exit status of the last command executed in consequent-commands, or zero if none was executed.
while
while
command is:
while test-commands; do consequent-commands; doneExecute consequent-commands as long as test-commands has an exit status of zero. The return status is the exit status of the last command executed in consequent-commands, or zero if none was executed.
for
for
command is:
for name [in words ...]; do commands; doneExpand words, and execute commands once for each member in the resultant list, with name bound to the current member. If `in words' is not present, `in "$@"' is assumed. The return status is the exit status of the last command that executes. If there are no items in the expansion of words, no commands are executed, and the return status is zero.
The break
and continue
builtins (see section Bourne Shell Builtins)
may be used to control loop execution.
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