Diff b/w $@ and $#


Login or Register for Dates, Times and to Reply

 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Diff b/w $@ and $#
# 1  
Diff b/w $@ and $#

Hello,

Pls explain the difference between $# and $@, and how its used in shell scripting .

Thanks in advance
# 2  
In short, RTFM.

Under Special Parameters in man sh
Code:
       @      Expands  to  the positional parameters, starting from one.  When
              the  expansion  occurs  within  double  quotes,  each  parameter
              expands to a separate word.  That is, "$@" is equivalent to "$1"
              "$2" ...  When there are no positional parameters, "$@"  and  $@
              expand to nothing (i.e., they are removed).
       #      Expands to the number of positional parameters in decimal.

# 3  
Thanks for the info, but its not clear to me can you explain me via an example......
# 4  
An example to help you understand better.

$# - Will give you the number of arguments passed to the script
$@ - Will list all the arguments passed

Code:
/export/home/test/mons/UnixForum>cat test.sh
#!/bin/ksh
print "The number of arguments passed to this shell script is " $#

print "The arguments passed are as follows"
print "$@"

Code:
/export/home/test/mons/UnixForum>test.sh hai welcome to unixforum .com
The number of arguments passed to this shell script is  5
The arguments passed are as follows
hai welcome to unixforum .com

# 5  
Thanks for the expalantion ......
Login or Register for Dates, Times and to Reply

Previous Thread | Next Thread
Thread Tools Search this Thread
Search this Thread:
Advanced Search

Test Your Knowledge in Computers #922
Difficulty: Easy
Unix time can be extended backwards from the epoch using negative numbers.
True or False?

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Diff 3 files, but diff only their 2nd column

Guys i have 3 files, but i want to compare and diff only the 2nd column path=`/home/whois/doms` for i in `cat domain.tx` do whois $i| sed -n '/Registry Registrant ID:/,/Registrant Email:/p' > $path/$i.registrant whois $i| sed -n '/Registry Admin ID:/,/Admin Email:/p' > $path/$i.admin... (10 Replies)
Discussion started by: kenshinhimura
10 Replies

2. Shell Programming and Scripting

serach diff filename in diff location using shell scripting

Hi, I am new to shell scripting. please help me to find out the solution. I need a script where we need to read the text file(consists of all file names) and get the file names one by one and append the date suffix for each file name as 'yyyymmdd' . Then search each file if exists... (1 Reply)
Discussion started by: Lucky123
1 Replies

3. Shell Programming and Scripting

.procmailrc and uudeview (put attachments from diff senders to diff folders)

Moderator, please, delete this topic (1 Reply)
Discussion started by: optik77
1 Replies

4. UNIX for Dummies Questions & Answers

Diff between more and less

Hi, Can anyone tell me the diff between the two filters "more" and "less"? Many thanks. Regards, Venkat. (4 Replies)
Discussion started by: venkatesht
4 Replies

5. Shell Programming and Scripting

diff

OS : SuSE Linux 10 (zOS) I create two files test1 and test2 /home/me # more test1 1 2 3 4 5 /home/me # more test2 1 2 3 I entered the following command on cronjob and its work diff /home/me/test1 /home/me/test2 > /home/me/test3 its created test3. But the output of test3 is as... (1 Reply)
Discussion started by: sdhn1900
1 Replies

6. UNIX for Dummies Questions & Answers

Using diff

is there any way to make the diff function compare 1 folder to another instead of just file to file? also, can binary files be compared? (2 Replies)
Discussion started by: puzzler
2 Replies

7. Shell Programming and Scripting

Simulate SVN diff using plain diff

Hi, svn diff does not work very well with 2 local folders, so I am trying to do this diff using diff locally. since there's a bunch of meta files in an svn directory, I want to do a diff that excludes everything EXCEPT *.java files. there seems to be only an --exclude option, so I'm not sure... (3 Replies)
Discussion started by: ackbarr
3 Replies

8. UNIX for Dummies Questions & Answers

diff

hi all, i want to do this shell script. create a script that will check the transferred file vs. orig file. 1. diff the file1 and file2 2. if difference found, retain the original file and email to netcracker team. 3. if no difference found, delete the previous file and retain... (3 Replies)
Discussion started by: tungaw2004
3 Replies

9. Shell Programming and Scripting

diff 2 files; output diff's to 3rd file

Hello, I want to compare two files. All records in file 2 that are not in file 1 should be output to file 3. For example: file 1 123 1234 123456 file 2 123 2345 23456 file 3 should have 2345 23456 I have looked at diff, bdiff, cmp, comm, diff3 without any luck! (2 Replies)
Discussion started by: blt123
2 Replies

10. UNIX for Dummies Questions & Answers

diff and ed?

I am trying to use the diff command to find the differences between two txt files. From here, I wish to use the ed command to create the first file from the second file. I am fairly new to unix, and I haven't got a clue how to do this. Can anyone help me please? Cheers (2 Replies)
Discussion started by: Brototype
2 Replies

Featured Tech Videos