How to come out of while loop?


 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting How to come out of while loop?
# 1  
Old 12-24-2010
How to come out of while loop?

Hello Team,

I have prepared script using while loop which will run until six counts and will stop after six counts. I would like to improve the script to come out of loop anytime. Can someone please help me on this?

Code:
c=1
while [ $c -le 6 ]
do
echo "Enter the tomcat as tomcat1,tomcat2,tomcat3,tomcat4,tomcat5,tomcat6"
read tomcat
echo "tomcat is $tomcat"
(( c++ ))
done

# 2  
Old 12-24-2010
Add one more option.

Code:
echo "Enter the tomcat as tomcat1,tomcat2,tomcat3,tomcat4,tomcat5,tomcat6 or q for exit"
read tomcat
[[ "$tomcat" = "q" ]] && exit 1
echo "tomcat is $tomcat"

R0H0N
# 3  
Old 12-24-2010
Thanks a lot Rohan, The below ecript is working fine now.

Code:
#!/bin/bash
c=1
while [ $c -le 6 ]
do
echo "Enter the tomcat as tomcat1,tomcat2,tomcat3,tomcat4,tomcat5,tomcat6 or q for exit"
read tomcat
if [ "$tomcat" == "q" ]
then
exit 112
else
echo "tomcat is $tomcat"
(( c++ ))
fi
done

---------- Post updated at 05:57 AM ---------- Previous update was at 05:45 AM ----------

Hello Team,

I need one more improvement in below script if anyone tries to enter same tomcat again then script should prompt that this tomcat is already enter,please enter diffrent tomcat from the list.

For ex :- If anyone trying to enter tomcat1 or tomcat2 etc twice then it should prompt message enter different tomcat. kindly give suggestions.

Code:
#!/bin/bash
c=1
while [ $c -le 6 ]
do
echo "Enter the tomcat as tomcat1,tomcat2,tomcat3,tomcat4,tomcat5,tomcat6 or q for exit"
read tomcat
if [ "$tomcat" == "q" ]
then
exit 112
else
echo "tomcat is $tomcat"
(( c++ ))
fi
done

# 4  
Old 12-24-2010
Two ways. Record your input in file or in variable.

Variable:
Code:
#!/bin/bash
c=1
inputs=""
while [ $c -le 6 ]
do
    echo "Enter the tomcat as tomcat1,tomcat2,tomcat3,tomcat4,tomcat5,tomcat6 or q for exit"
    read tomcat
    if [ "$tomcat" == "q" ]
    then
        exit 112
    elif echo "$inputs" | grep "${tomcat}"
    then
        echo "${tomcat} has been already entered."
    else
        echo "tomcat is $tomcat"
        inputs="${inputs}${tomcat}"
        (( c++ ))
    fi
done

File:
Code:
#!/bin/bash
c=1
>recordFile
while [ $c -le 6 ]
do
    echo "Enter the tomcat as tomcat1,tomcat2,tomcat3,tomcat4,tomcat5,tomcat6 or q for exit"
    read tomcat
    if [ "$tomcat" == "q" ]
    then
        exit 112
    elif grep "${tomcat}" recordFile
    then
        echo "${tomcat} has been already entered."
    else
        echo "tomcat is $tomcat"
        echo "${tomcat}" >> recordFile
        (( c++ ))
    fi
done

R0H0N
# 5  
Old 12-26-2010
Code:
c=1
while [ $c -le 6 ]
do
echo "Enter the tomcat as tomcat1,tomcat2,tomcat3,tomcat4,tomcat5,tomcat6"
read tomcat

if [ <required condition is true> ] ; then
# do your required options .
          break ;
else
          continue ;
fi
 
(( c++ ))
done


Last edited by Scott; 12-26-2010 at 09:34 AM.. Reason: Code tags, please...
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

For loop or while loop from a text file

Hi all, i developed a script to measure the uptime of a process in a Solaris 10/11 environments. All is well, but i came across a situation where there are multiple processes of the same name. Basically i have the following result file: beVWARS 13357 19592122 beVWARS 14329 19591910... (4 Replies)
Discussion started by: nms
4 Replies

2. Shell Programming and Scripting

awk loop using array:wish to store array values from loop for use outside loop

Here's my code: awk -F '' 'NR==FNR { if (/time/ && $5>10) A=$2" "$3":"$4":"($5-01) else if (/time/ && $5<01) A=$2" "$3":"$4-01":"(59-$5) else if (/time/ && $5<=10) A=$2" "$3":"$4":0"($5-01) else if (/close/) { B=0 n1=n2; ... (2 Replies)
Discussion started by: klane
2 Replies

3. Shell Programming and Scripting

Reset while loop to loop same file multiple times

Hi, I want to read file multiple times. Right now i am using while loop but that is not working. ex. While read line do while read line2 do echo stmt1 #processing some data based on data., done < file2.txt done < file1.txt # This will have 10... (4 Replies)
Discussion started by: tmalik79
4 Replies

4. Shell Programming and Scripting

Array Variable being Assigned Values in Loop, But Gone when Loop Completes???

Hello All, Maybe I'm Missing something here but I have NOOO idea what the heck is going on with this....? I have a Variable that contains a PATTERN of what I'm considering "Illegal Characters". So what I'm doing is looping through a string containing some of these "Illegal Characters". Now... (5 Replies)
Discussion started by: mrm5102
5 Replies

5. Shell Programming and Scripting

My for loop decides to become an infinite loop?

Hi, I was debating if I should put this in the dummies or scripts section, I apologize in advance if I chose poorly. Fairly new to Unix and BASH scripting but I thought I made it fairly well given my limited understanding. However, the output indicates that it's looping and I'm ending up with a... (5 Replies)
Discussion started by: gotreef
5 Replies

6. Shell Programming and Scripting

S# in a for loop - concatenate $(loop counter)

Hi, hope I am posting in the right section. My problem is that I have 2 or more arguments passed and I want to check if the arguments passed exists or not. The first argument should not exist and the remaining others should exist. example: ./shells.sh argument1 argument2 argument3 ... (5 Replies)
Discussion started by: fight4love
5 Replies

7. 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

8. Shell Programming and Scripting

Null Handling in Until loop. . .loop won't stop

Hi Im running this script, which is supposed to find the max value build some tables and then stop running once all the tables are built. Thing is , it keeps assigning a null value to $h and then $g is null so it keep building tables i.e. testupdateNUL. How can I stop this? Here is what I have: ... (4 Replies)
Discussion started by: brandono66
4 Replies

9. 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

10. Shell Programming and Scripting

Is there a better way I could have run this loop. (For loop with two variables)

Sorry for such a dreadful title, but I'm not sure how to be more descriptive. I'm hoping some of the more gurutastic out there can take a look at a solution I came up with to a problem, and advice if there are better ways to have gone about it. To make a long story short around 20K pieces of... (2 Replies)
Discussion started by: DeCoTwc
2 Replies
Login or Register to Ask a Question