Linux - How to call lines from a file in a for loop???

[lel7lel7]

Hi,

I am new to Linux and am trying to pull several lines from one file to modify them.

I have written a file table.txt...

[lg45@dev64-mgmt ~]$ cat table.txt
 
Angiogenin 10 25793633 25815393
Alpha-actinin 28 7893500 7941168

I want to pull out column 3 of each line and loop through them all adding 500,000bp.

I know that i can use awk to call...

[lg45@dev64-mgmt ~]$ awk '{print$3'} table.txt

I am looking for suggestions on how i can modify the following to add an awk statement that pulls out each column but still allows me to loop?

[lg45@dev64-mgmt ~]$ for i in `cat table.txt`; do echo $i; done

Thanks :)
lesley

[shabinesh]

while read line
do
  /*your code*/
done < table.txt
 

[Hydaral]

I don't quite understand what you want to accomplish, do you want to add 500000 to the number in the third column, or append the string "500,000bp" to it?

Perhaps you could give an example of the expected output.

If you just want to operate on the third column, then you don't need any loops.