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Truncate string variable

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# 1  
Old 05-10-2010
Truncate string variable
Hi,

I want to truncate a string variable, returned in the script. In perl I used the below and it worked.

BRNo=BR12345
$BR = substr($BRNo, 2, 7)

How can I do it in sh.

Thanks !
# 2  
Old 05-10-2010
Code:
echo 'BR12345' | sed 's/^..\(.....\).*/\1/'

This User Gave Thanks to vgersh99 For This Post:
script2010
# 3  
Old 05-10-2010
Code:
$ expr $BRNo : '..\(.....\)'
12345
$ expr $BRNo : '..\(.\{5\}\)'
12345

# 4  
Old 05-10-2010
Two other ways for substrings :
Code:
$ Str=123456789
$ s1=$(expr substr "${Str}" 2 3)
$ echo $s1
234
$ s2=${Str:1:3}    # bash
$ echo $s2
234
$

Jean-Pierre.
Last edited by aigles; 05-10-2010 at 05:01 PM.. Reason: Added missign assignment statement to s1 variable
# 5  
Old 05-10-2010
Code:
brno=br12345
br=`echo $brno|cut -c3-7`

# 6  
Old 05-10-2010
Quote:
Originally Posted by aigles
Two other ways for substrings :
Code:
$ Str=123456789
$ echo $s1
234
$ s2=${Str:1:3}    # bash
$ echo $s2
234
$

Jean-Pierre.
Jean, You missed the assignment statement to s1 variable
# 7  
Old 05-10-2010
in ksh, just use a variable declaration:

Code:
typeset -L5 x

x=aslkdhflaalkshdlkhasd
echo $x
aslkd
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