Padding expr output

[BSD Freak]

Hi all,

I am usiung expr in a shell script and need to pad it's output to 
always be 3 characters. An example will explain thing better:

% expr 007 + 1
Output is 8

I need the output to be 008


I checked the expr man page, but nothing there solves my problem. 
Anyone out there got one?

Thanks in advance



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Re: Padding expr output

[Roman Neuhauser]

# [EMAIL PROTECTED] / 2002-12-23 10:57:19 +1100:
 Hi all,
 
 I am usiung expr in a shell script and need to pad it's output to 
 always be 3 characters. An example will explain thing better:
 
 % expr 007 + 1
 Output is 8
 
 I need the output to be 008

printf(8)

zero-padded integer and octal, respectively:
roman@freepuppy ~ 1029:0  printf %03d\n $(expr 8 + 1)   
009
roman@freepuppy ~ 1030:0  printf %#o\n $(expr 8 + 1)   
011
roman@freepuppy ~ 1031:0   

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Re: Padding expr output

[Roman Neuhauser]

# [EMAIL PROTECTED] / 2002-12-23 01:12:22 +0100:
 # [EMAIL PROTECTED] / 2002-12-23 10:57:19 +1100:
  Hi all,
  
  I am usiung expr in a shell script and need to pad it's output to 
  always be 3 characters. An example will explain thing better:
  
  % expr 007 + 1
  Output is 8
  
  I need the output to be 008
 
 printf(8)

printf(1), of course.

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Re: Padding expr output

[Kurt Bigler]

on 12/22/02 3:57 PM, BSD Freak [EMAIL PROTECTED] wrote:

 Hi all,
 
 I am usiung expr in a shell script and need to pad it's output to
 always be 3 characters. An example will explain thing better:
 
 % expr 007 + 1
 Output is 8
 
 I need the output to be 008
 
 
 I checked the expr man page, but nothing there solves my problem.
 Anyone out there got one?

Don't use expr to do the formatting.

Use some sprintf-like capability in some scripting language that supports
full functionality from the command-line.  I think both awk and perl have
that capability in some form.  (Maybe someone else can be more specific.)

 
  Kurt Bigler


 
 Thanks in advance


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Re: Padding expr output

[Mike Jeays]

Kurt Bigler wrote:


on 12/22/02 3:57 PM, BSD Freak [EMAIL PROTECTED] wrote:

 

Hi all,

I am usiung expr in a shell script and need to pad it's output to
always be 3 characters. An example will explain thing better:

% expr 007 + 1
Output is 8

I need the output to be 008


I checked the expr man page, but nothing there solves my problem.
Anyone out there got one?
   


Don't use expr to do the formatting.

Use some sprintf-like capability in some scripting language that supports
full functionality from the command-line.  I think both awk and perl have
that capability in some form.  (Maybe someone else can be more specific.)


 Kurt Bigler


 

Thanks in advance
   



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In bash:

i=8
while [ ${#i} -lt 3 ]
do
 i=0${i}
done
echo $i



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