for i in `seq 1 10`;do echo $i;done
1) -w specifies that the output numbers have the same width
seq -w 98 101
098
099
100
101
2) -s specifies that the delimiter defaults to carriage return
seq -s '-' 1 3
1-2-3
3) -f option specifies the format default space
seq -f "%03g" 9 11
009
010
011
The number of digits specified after % is "%g" by default ,
"%3g" then the insufficient number of digits is a space seq -f "%3g" 9 11
seq -f 'abc%g' 1 3
abc1
abc2
abc3