awk - why this is not working? trying next word!

Shell Programming and Scripting
1

Hi Experts,
Can you please advise , why I am not able to make it work, or why this is not working: I spent quite a lot of time on this figuring out , but not working,

file :

This is a test file thanks for your reply
This is another file again 
Have a nice day this is a small file thanks again.

I am trying:

cat file|awk '{for(i=i;i<=NF;i++)if($i~"file") print $(i+1)}'

Output:

cat file|awk '{for(i=i;i<=NF;i++)if($i~"file") print $(i+1)}'
awk: Field $() is not correct.
 The input line number is 1.
 The source line number is 1.

The output should be :

thanks 
again
thanks
2

i in $i is undefined because you incorrectly initialize it to itself.

Regards,
Alister

3

So how do I get the above output, do I have to store in an array first. Thank you ..

4

i=1 not i=i

< file awk '{for(i=1;i<NF;i++) if($i~"file") print $(i+1)}'