Append , at the end of each line except the last line

[infdeveloper]

Hello,

Could you please help me answer the question
I have a file like
x
y
z

I want it to append , at the end of each file except the last file
x,
y,
z

I am getting , at the end of each line with sed 's/$/,/' but I dont want it at end of the last line

Thanks

Could you please help me get this

 

[Ogzilal]

Hi,

Use this sed sequence will do the job

sed -e '1,$ s/$/,/' -e '$ s/,$//' /path/to/your_file > new_file

the 1st -e puts a comma after all the lines
the 2nd -e supresses the comma putted on the the last line by the 1st -e

Ali