How to manipulate text lines and Create two separate files for odd and even

How to manipulate text lines and Create two separate files for odd and even ?

file 1:

iitmc01n01
iitmc01n03
.
.
iitmc01n71

file 2:

iitmc01n02
iitmc01n04
.
.
iitmc01n72

Answer

I’d say

awk '/[13579]$/ { print > "file1"; next } { print > "file2" }' inputfile

This will print lines in inputfile that end with 1, 3, 5, 7, or 9 to file1 and all others to file2.