How do I get the last word in each line with bash

Question

For example i have a file:

$ cat file  i am the first example.  i am the second line.  i do a question about a file. 

and i need:

example, line, file 

i intent with "awk" but the problem is that the words are in different space

Answer 1

Try

$ awk 'NF>1{print $NF}' file example. line. file. 

To get the result in one line as in your example, try:

{     sub(/\./, ",", $NF)     str = str$NF } END { print str } 

output:

$ awk -f script.awk file example, line, file,  

Pure bash:

$ while read line; do [ -z "$line" ] && continue ;echo ${line##* }; done < file example. line. file.