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Unix Scripting Compare Integers

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# 1  
Old 01-14-2009
Unix Scripting Compare Integers
I have a file with the following:

87565
82155
102656
151
162


I want to write korn shell script that will read each line in a loop and remove any number that has less than 5 digits, e.g., 151 and 152.

thank you,

KeokiSmilie
# 2  
Old 01-14-2009
Comparing string lengths

Your title is incorrect. You do not want to compare integers, you want to compare string lengths.

Code:
while read n
do
  [ ${#n} -ge 5 ] && printf "%s\n" "$n"
done < FILE

For a large file, it will be faster with awk, sed or even grep:

Code:
awk 'length >= 5' FILE

awk '/...../' FILE

sed -n '/...../p' FILE

grep '.....' FILE

Last edited by cfajohnson; 01-14-2009 at 10:29 PM..
# 3  
Old 01-14-2009
Try...
Code:
grep ..... file

# 4  
Old 01-15-2009
Thank you very much, your code does exactly what I want.

I guess was I not articulating my problem corretly so I had no luck searching the newsgroups.
# 5  
Old 01-15-2009
Yeah, ..... will work for 5 digits/letters/zebras.. but just in case you want to get them from a file that has letters or other stuff..

egrep "[0-9]{5,}" FILE

I know it looks different, but I like to search for *exactly* what I am searching for, maybe I am just weird. Smilie
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