for/while loop...awk

[OOdle nOOdle]

hi i am trying to run a for loop in csh, but i don't think that it is possible, the for loop is to loop round say

for (i=0; i<=5; i++){
in here i want to run a file or a pipe to copy a line repeatedly, then save result in a file
}

i am relatively new here and am not sure the correct syntax
i have been trying for hours
do i need to use awk or am i ok in csh

help!

[Franklin52]

Welcome to the forum.

Try this:

for i = 0 to 4 do
  # do your stuff here
end

Awk is not a shell but a text manipulation tool. I should begin with Bash instead of csh.

Regards

[anomie]

Can I ask why csh? I thought bash was the default shell for just about every Linux distro under the sun. You may find it a lot easier to script with, too.

[drl]

Hi.

I agree with most other people: use bash, ksh, etc., any of the Bourne shell family is preferable to csh family for scripting.

However, if you must, you may be able to use one of these:

#!/bin/tcsh

# @(#) s3       Demonstrate loops in [t]csh.

echo
echo $version | fold -66
echo

echo " foreach loop:"
foreach i ( `/usr/bin/seq 0 3` )
  echo " i is $i"
end

echo
echo " while loop:"
set j = 0
while ( $j < 4 )
  echo " j is $j"
  @ j++
end

exit 0

producing:

% ./s3

tcsh 6.13.00 (Astron) 2004-05-19 (i386-intel-linux) options 8b,nls
,bye,al,ng,rh,nd,color,filec

 foreach loop:
 i is 0
 i is 1
 i is 2
 i is 3

 while loop:
 j is 0
 j is 1
 j is 2
 j is 3

For a host of reasons not to use csh, see:
Csh Programming Considered Harmful

Best wishes ... cheers, drl

[OOdle nOOdle]

cheers guys helped, got it working now, can move along nicely

[ghostdog74]

hi i am trying to run a for loop in csh, but i don't think that it is possible, the for loop is to loop round say

for (i=0; i<=5; i++){
in here i want to run a file or a pipe to copy a line repeatedly, then save result in a file
}

i am relatively new here and am not sure the correct syntax
i have been trying for hours
do i need to use awk or am i ok in csh

help!

depending on what you are doing, you can also use awk for loop

awk 'BEGIN {
        for (i=1;i<5;i++) {
                #do something
        }
} '