Comments on: Bash While Loop Example

By: vaishali

vaishali — Wed, 24 Aug 2011 04:59:22 +0000

how to write a program in bash for displaying table using until statement? table should be like
1 2 3 4
2 4 6 8
3 6 9 12
4 8 12 16
plz reply soon….thanks

By: Georg

Georg — Sat, 15 Jan 2011 13:38:51 +0000

The script “test” should set variable “filter_mode” to FALSE if there are no lines in the file “switches” and to TRUE if there exists at least one line in the file “switches”.
Why do I get “filter_mode : FALSE” eventually?

gg@GeorgSimon:~$ cat test
#!/bin/bash

filter_mode=FALSE
cat ./switches | while read switch ; do
echo switch : $switch
filter_mode=TRUE
echo filter_mode : $filter_mode
break
done
echo filter_mode : $filter_mode
gg@GeorgSimon:~$ cat switches
switch
gg@GeorgSimon:~$ sh test
switch : switch
filter_mode : TRUE
filter_mode : FALSE

By: Vivek Gite

Vivek Gite — Wed, 24 Nov 2010 12:00:19 +0000

#!/bin/bash
i=1
y=1
while [ $i -le 5 ]
do
while [ $y -le 10 ]
do
echo "$y * $i = $(( $y * $i ))"
(( y++ ))
done
y=1
(( i++ ))
done

By: Elaine

Elaine — Wed, 24 Nov 2010 11:19:08 +0000

does anyone can give an example of a while loop within a loop?

By: san

san — Mon, 04 Oct 2010 12:32:07 +0000

shift command
to traverse through arguments
x=1
while [ $x -le 3 ]
do
echo “argument is :$1″
shift
x=`expr $x + 1`
done

By: pritam singh

pritam singh — Fri, 06 Aug 2010 08:07:44 +0000

Thank you so much .
you define very nicly all exampls regarding while loop secquence
statement….

By: Nikki

Nikki — Tue, 20 Jul 2010 16:32:56 +0000

Does anyone know how to write a script that echoes three different arguments three times using a loop

By: pranathy

pranathy — Wed, 04 Nov 2009 05:58:05 +0000

could u please give the shell script for printing the fibonocci series and to know if the number is palindrome and also if it an armstrong number

By: Cobra

Cobra — Wed, 28 Oct 2009 07:38:38 +0000

Very useful examples, thank you!

By: vivek

vivek — Tue, 18 Mar 2008 10:22:59 +0000

Yes there is a break and continue statement. man bash has more information.

By: Leslie Satenstein

Leslie Satenstein — Sun, 16 Mar 2008 01:02:32 +0000

Nice to see the Bash shell,
How do you break out of a loop

is there a break statement, or do you have to use a goto?