repeat(1)

NAME | SYNOPSIS | DESCRIPTION | EXAMPLES | ATTRIBUTES | SEE ALSO | NOTES

NAME

for, foreach, repeat- shell built-in functions to repeatedly execute action(s) for a selected number of times

SYNOPSIS

sh

for word [inwordlist...] ; do actions ; done


csh

foreach word ( wordlist )
[...]
end
repeat count command


ksh

for word [inwordlist...] ; do actions ; done

DESCRIPTION

sh

Each time a for command is executed, word is set to the next item taken from the in wordlist. If in wordlist . . . is omitted, then the for command executes the do actions once for each positional parameter that is set. Execution ends when there are no more words in the list.

csh

The variable word is successively set to each member of wordlist. The sequence of commands between this command and the matching end is executed for each new value of word. Both foreach and end must appear alone on separate lines.

repeat executes command repeatedly count times. count must be a number. command is restricted to a one-line statement.

ksh

Each time a for command is executed, word is set to the next item taken from the in wordlist. If in wordlist . . . is omitted, then the for command executes the do actions once for each positional parameter that is set. Execution ends when there are no more words in the list.

loop interrupts

The built-in command continue may be used to terminate the execution of the current iteration of a for or foreach loop, and the built-in command break may be used to terminate execution of a for or foreach command.

EXAMPLES

---

Example 1 Examples using the for command.




In the examples using for/foreach, the code counts the number of lines for each file in the current directory whose name ends with a ".c" extension. The repeat example prints "I will not chew gum in class" 500 times.

---

sh

for file in *.c ; do wc -l $file ; done

csh

foreach file ( *.c) wc -l $file end

ksh

for file in *.c ; do wc -l $file ; done

csh

The repeat command re-executes the single subsequent command for count number of times.

@ repetition = 500 repeat $repetition echo "I will not chew gum in class."

ATTRIBUTES

See attributes(5) for descriptions of the following attributes:

ATTRIBUTE TYPE	ATTRIBUTE VALUE
Availability	SUNWcsu

SEE ALSO

break(1), csh(1), ksh(1), sh(1), attributes(5)

NOTES

Both the Bourne shell sh and the Korn shell ksh can use the semicolon (;) and the carriage return interchangeably in their syntax of the if, for, and while built-in commands.

SunOS 5.8  Last Revised 15 Apr 1994

NAME | SYNOPSIS | DESCRIPTION | EXAMPLES | ATTRIBUTES | SEE ALSO | NOTES