Question

I have text file, names.txt, with every row containing a last name:

Smith
Johnson
Morgan
...
...

I’d like to add seven random numbers between 0 and 100 to each line to make it look like this:

Smith 76 94 56 99 32 21 11
Johnson 54 15.2 19.8 32.66 44.99 22.63 18.99 
Morgan 99 18.6 24.75 99.22 35.18 65.34 54.22
....
....

I tried using this command in awk:

$ awk '{print $0; for (myvar = 1; myvar <= 7; myvar++) print rand()*100}' names.txt 

but that gave me

Smith
76
94
56

etc.

I know I have to use printf, somehow to make it work, and I tried this:

$ awk '{printf $0; for (myvar = 1; myvar <= 7; myvar++) printf rand()*100}' names.txt 

but with that, I get no end-of-lines anywhere. The whole thing is just one line.
I’ll very much appreciate any suggestions.

Answer 1

Add line terminator at the end of each line

awk '{printf "%s ", $0; for (myvar = 1; myvar <= 7; myvar++) \
     printf "%d ", rand()*100; printf "\n"}' names.txt