Printf in shell

printf "Surname: %s\nName: %s\n" "$SURNAME" "$LASTNAME"

$ seq 1000010 612 1004910
1.00001e+06
1.00062e+06
1.00123e+06
1.00185e+06
1.00246e+06
1.00307e+06
1.00368e+06
1.00429e+06
1.00491e+06

$ seq 1000010 612 1004910 | xargs printf "%10.0f\n"
   1000010
   1000620
   1001230
   1001850
   1002460
   1003070
   1003680
   1004290
   1004910

$ seq 1000010 612 1004910 | xargs printf "%10.2f\n"
1000010.00
1000620.00
1001230.00
1001850.00
1002460.00
1003070.00
1003680.00
1004290.00
1004910.00