seq flags & options

Basic usage

Print numbers from 1 to N.

seq 10

Start and end

Print numbers from START to END.

seq 5 10

Step value

Print numbers with a custom increment.

seq 0 2 20

seq 1 0.5 5

-s, --separator

Set the separator between numbers.

seq -s, 1 5

seq -s ' ' 1 10

-w, --equal-width

Pad numbers with leading zeros for equal width.

seq -w 1 100

-f, --format

Use printf-style formatting.

seq -f "file_%03g.txt" 1 10

seq -f "%.2f" 0 0.1 1

Countdown

Use a negative step.

seq 10 -1 1

Loop usage

Common pattern for shell loops.

for i in $(seq 1 5); do echo "Item $i"; done