Sponsored Content
Full Discussion: Assigning inside for loop
Top Forums Shell Programming and Scripting Assigning inside for loop Post 302218396 by thana on Friday 25th of July 2008 03:53:21 AM
Old 07-25-2008
Assigning inside for loop

If I have 3 variables and I want to check if any of these is null. If one of them is null then it should be assigned a value of 0.I have the following code below.
The output should be 0 is A, 11 is B, 33 is C


Code:
$a=
$b=11
$c=33
$echo $a $b $c
$11 33

for i in "${a}" "${b}" "${c}";
do
 if [ "${i}" = "" ];then
   Assign the value to 0
 fi
done

echo After
echo $a is A, $b is B, $c is C

 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Assigning values to an array via for/while loop

I need to do something like this: for i in 1 2 3 4 5; do arr=$(awk 'NR="$i" { print $2 }' file_with_5_records) done That is, parse a file and assign values to an array in an ascending order relative to the number of record in the file that is being processed on each loop. Is my... (2 Replies)
Discussion started by: fiori_musicali
2 Replies

2. Shell Programming and Scripting

Using variables created sequentially in a loop while still inside of the loop [bash]

I'm trying to understand if it's possible to create a set of variables that are numbered based on another variable (using eval) in a loop, and then call on it before the loop ends. As an example I've written a script called question (The fist command is to show what is the contents of the... (2 Replies)
Discussion started by: DeCoTwc
2 Replies

3. Solaris

Assigning Temp IP inside zones

I want to assign ip to a zone , but i dont want that ip to be retained when the zone is rebooted , is there a way to do it ? Thx (7 Replies)
Discussion started by: skamal4u
7 Replies

4. Shell Programming and Scripting

For Loop and assigning Value using Sed

Hi, Please help me writing for loop to fetch data and store in variable from a text file which contains data as below: 12 46 56 5466 111 There are 40 lines of data...!!!! I jus need all data from line no 4 to 40 ie data for 4,6,8......40. (2 Replies)
Discussion started by: fidelis
2 Replies

5. Solaris

For loop variable not assigning

Hi , i am using below code print the PATH value inside for loop but it's printing just PATHD & not the original value which i defined. #!/usr/bin/bash PATHD1=/spp/sp/LIVE export PATHD1 PATHD2=/spp/sp/TEST export PATHD2 j=2 for (( i = 1 ; i <= j ; i++ )) do PATH_DIR=PATH$i echo PATHD$i... (2 Replies)
Discussion started by: panneer76
2 Replies

6. Shell Programming and Scripting

BASH loop inside a loop question

Hi all Sorry for the basic question, but i am writing a shell script to get around a slightly flaky binary that ships with one of our servers. This particular utility randomly generates the correct information and could work first time or may work on the 12th or 100th attempt etc !.... (4 Replies)
Discussion started by: rethink
4 Replies

7. Shell Programming and Scripting

problem in assigning substr to a variable inside awk

Hi All, I have a fixed-width datafile from which i need to extract value/string starting from some position to the specified length in each of the lines. awk '{print substr($0,x,y)}' datafile --- is working fine but awk 'BEGIN{a=0}{a=substr($0,x,y);print $a}' datafile ---is giving... (3 Replies)
Discussion started by: loggedin.ksh
3 Replies

8. Shell Programming and Scripting

Need help in assigning output of n commands to n variables automatically inside a for loop

Please help me to automatically assign the output of awk command to the variables cs3, cs4, cs5 and cs6 using a for loop. The below code is not working. for i in 3 4 5 6 do cs$i=`awk -F"|" 'BEGIN{sum=0}{sum=sum+$'$i'}END{printf("%d\n", sum)}' css` done echo $cs3 $cs4 $cs5 $cs6 (9 Replies)
Discussion started by: thulasidharan2k
9 Replies

9. UNIX for Advanced & Expert Users

couting occurences of a character inside a string and assigning it to a variable

echo "hello123" | tr -dc '' | wc -c using this command i can count the no of times a number from 0-9 occurs in the string "hello123" but how do i save this result inside a variable? if i do x= echo "hello123" | tr -dc '' | wc -c that does not work...plz suggest..thanks (3 Replies)
Discussion started by: arindamlive
3 Replies

10. Shell Programming and Scripting

Assigning values to 2 variables within for loop

Hi All, Is it possible to grep for two files and assign their names to two separate variables with for loop? I am doing the below currently: if then for fname in $( cd $dirA ; ls -tr | grep "^Ucountry_file$") do InFile=$dirA/$fname ... (4 Replies)
Discussion started by: swasid
4 Replies
echo(1B)					     SunOS/BSD Compatibility Package Commands						  echo(1B)

NAME
echo - echo arguments to standard output SYNOPSIS
/usr/ucb/echo [-n] [argument] DESCRIPTION
echo writes its arguments, separated by BLANKs and terminated by a NEWLINE, to the standard output. echo is useful for producing diagnostics in command files and for sending known data into a pipe, and for displaying the contents of envi- ronment variables. For example, you can use echo to determine how many subdirectories below the root directory (/) is your current directory, as follows: o echo your current-working-directory's full pathname o pipe the output through tr to translate the path's embedded slash-characters into space-characters o pipe that output through wc -w for a count of the names in your path. example% /usr/bin/echo "echo $PWD | tr '/' ' ' | wc -w" See tr(1) and wc(1) for their functionality. The shells csh(1), ksh(1), and sh(1), each have an echo built-in command, which, by default, will have precedence, and will be invoked if the user calls echo without a full pathname. /usr/ucb/echo and csh's echo() have an -n option, but do not understand back-slashed escape characters. sh's echo(), ksh's echo(), and /usr/bin/echo, on the other hand, understand the black-slashed escape characters, and ksh's echo() also understands a as the audible bell character; however, these commands do not have an -n option. OPTIONS
-n Do not add the NEWLINE to the output. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWscpu | +-----------------------------+-----------------------------+ SEE ALSO
csh(1), echo(1), ksh(1), sh(1), tr(1), wc(1), attributes(5) NOTES
The -n option is a transition aid for BSD applications, and may not be supported in future releases. SunOS 5.11 3 Aug 1994 echo(1B)
All times are GMT -4. The time now is 01:24 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy