Sponsored Content
Top Forums Shell Programming and Scripting use variable to set the range of a for loop Post 302553143 by yazu on Tuesday 6th of September 2011 11:39:38 PM
Old 09-07-2011
Code:
max=5; for i in `eval echo {1..$max}`; do echo $i; done

Code:
max=5; for i in $(seq 1 $max); do echo $i; done

 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Range specification in for loop

Hello Friends, I want to use range in for loop. For that i used (..) operator but it is not working. Ex: for i in 1..24 do echo $i done Instead of printing 1 to 24 nos, it gives o/p as: 1..24 Please help me Thanks in advance. (2 Replies)
Discussion started by: Niyati
2 Replies

2. Shell Programming and Scripting

set variable in while loop?

Dear All, Can anyone advise why this script isn't run as expected? =========================== status=0 cat /etc/passwd | while read line; do status=1 done echo $status =========================== it always return 0 , but not 1. why? anything wrong? Thanks. (1 Reply)
Discussion started by: tiger2000
1 Replies

3. HP-UX

What is the use of command set -- and set - variable?

Hi, I am using hp unix i want to know the use of the following commands set -- set - variable thanks (4 Replies)
Discussion started by: gomathi
4 Replies

4. Shell Programming and Scripting

For Loop Range Create Directories

Hello, I am a bit stumped on this. I am attempting to create 24 empty directories with a loop. Seems like I have incorrect syntax. When I run the following command I get the error below. Command $ for i in {2..24}; do mkdir $i_MAY_2011 ; doneError x 24 mkdir: missing operand Try `mkdir... (2 Replies)
Discussion started by: jaysunn
2 Replies

5. Shell Programming and Scripting

loop directories mv files to target in range

Hello, Currently I have a painstaking process that I use to move file for a monthly archive. I have to run the same two commands for 24 different directories. I wish to have a script with a for loop automate this and I have not been able to succeed. Here is what I do 24 times. I know this is... (5 Replies)
Discussion started by: jaysunn
5 Replies

6. Shell Programming and Scripting

How to set end limit while copying files of a range??

I have files being generated in format A20140326.00........ to A20140326.24............. I need to copy these hourly basis from one location to another. Eg. If i copy from 14 to 19 the hour, I use wildcard as A201403226.1*. Requirement is : I need to copy from 06 hour and wil run the script... (1 Reply)
Discussion started by: Saidul
1 Replies

7. Red Hat

Which is the effective ephemeral port range in Linux 2.6 for this set up?

In my Linux system ephemeral port range is showing different ranges as follows $ cat /proc/sys/net/ipv4/ip_local_port_range 32768 61000  cat /etc/sysctl.conf | grep net.ipv4.ip_local_port_range net.ipv4.ip_local_port_range = 9000 65500 Which will be the effective ephemeral port... (5 Replies)
Discussion started by: steephen
5 Replies

8. Shell Programming and Scripting

Unable to set Global variable outside while loop

Below is my code: count=0 if ... ... else ... find * -prune -type d | sort -r -n | while read d; do count=1 if ; then echo "Count1:$count" ... ... break 2; fi ... done ... fi echo "Count2:$count" (9 Replies)
Discussion started by: mohtashims
9 Replies

9. Shell Programming and Scripting

Help with sum range of data set together

Input File: 2000 3 1998 2 1997 2 1994 1 1991 1 1989 1 1987 2 1986 2 1985 1 1984 1 . . 10 277256 9 278274 8 282507 7 284837 6 287066 5 292967 (4 Replies)
Discussion started by: perl_beginner
4 Replies

10. UNIX for Beginners Questions & Answers

Cannot subset ranges from another range set

Ca21chr2_C_albicans_SC5314 2159343 2228327 Ca21chr2_C_albicans_SC5314 636587 638608 Ca21chr2_C_albicans_SC5314 5286 50509 Ca21chr2_C_albicans_SC5314 634021 636276 Ca21chr2_C_albicans_SC5314 1886545 1900975 Ca21chr2_C_albicans_SC5314 610758 613544... (9 Replies)
Discussion started by: cryptodice
9 Replies
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] 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 man 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 vari- able assignment. This means that tilde substitution is performed after the = sign, and also that word splitting and file name genera- tion are not performed. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ SEE ALSO
csh(1), exit(1), ksh(1), sh( 1), attributes(5) SunOS 5.10 17 Jul 2002 break(1)
All times are GMT -4. The time now is 02:24 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy