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Shell Programming and Scripting

Extract the letter from string

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# 1  
Old 11-23-2009
Extract the letter from string
Hi,

Pl help me.

User is entering the values for the given input

Enter keys: secret1 secret2 secret3

can i extract the last digit of each values in the keys..
here for ex. 1 2 3

can we get this using shell script?
# 2  
Old 11-23-2009
Code:
$ echo "secret1 secret2 serect3" |  awk '{gsub(/[a-z]/,""); print $0}'
1 2 3

Last edited by mkastin; 11-23-2009 at 12:24 PM.. Reason: adding code tags
# 3  
Old 11-23-2009
Code:
read secrets

for i in $secrets
do
        str=$str" "$(echo $i | sed 's/.*\([0-9]$\)/\1/')
done

echo $str

# 4  
Old 11-23-2009
Quote:
Originally Posted by mkastin
Code:
$ echo "secret1 secret2 serect3" |  awk '{gsub(/[a-z]/,""); print $0}'
1 2 3

Hi,

Thanks for the reply.

But am getting error...

echo "secret1 secret2 serect3" | awk '{gsub(/[a-z]/,""); print $0}'
awk: syntax error near line 1
awk: illegal statement near line 1
# 5  
Old 11-23-2009
Try using gawk or nawk instead of awk. You may have to install them and I would recommend doing that if you're able.


or

use sed

Code:
echo "secret1 secret2 secret3" | sed 's/[a-z]//g'

# 6  
Old 11-23-2009
i want to get the last digit.. it may contain letters also instead number..

your command works only to extract the numbers.. but i did not want this.

Pl help
# 7  
Old 11-23-2009
Please provide a better example of input and output that you are looking for.
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