nushell/docs/commands/def.md

title	layout	version
def	command	0.59.1

Define a custom command

Signature

> def (def_name) (params) (block)

Parameters

• def_name: definition name
• params: parameters
• block: body of the definition

Examples

Define a command and run it

> def say-hi [] { echo 'hi' }; say-hi

Define a command and run it with parameter(s)

> def say-sth [sth: string] { echo $sth }; say-sth hi