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Hi,
can I do something like this to add a condition of checking if the 4th field is number or space or blank also:

awk -F, '$4 /^[]*||[0-9]*/' MYFILE >> OTHERFILE

I also want the other part...

can I do something like this to add one more condition of checking if the 4th field is number or space or blank also:

awk -F, '$4 /^[]*||[0-9]*/' MYFILE >> OTHERFILE

I also want the other...

Thank you.

I have a file as:
A,B,C,D,E
G,H,I,J,K

I need to find if fourth field is blank or has a space and print that line to other file.

I tried using awk but am not getting the desired result.
Pls...