seq

Additional Notes

seq is a shell command used to print a sequence of numbers. It generates sequences of numbers for use in loops, command substitution, or generating test data.

seq is part of GNU coreutils. Use seq FIRST INCREMENT LAST for custom step sizes, or -w to zero-pad output.

Syntax

seq [arguments]

Parameters

• options: Flags that change how seq behaves.
• arguments: Values consumed by the shell builtin or script command.
• command: Command line to run, test, wrap, or control.

Common Options

• -f FORMAT: Use printf-style formatting.
• -s SEP: Use a custom separator.
• -w: Equalize width by padding with zeros.

Examples

seq 5
seq 1 2 9
seq -w 1 12

Practical Notes

seq is often used with command substitution or loops in shell scripts.