let

For core.

Create a variable and give it a value.

Command Type

keyword

> let {flags} (var_name) (initial_value)

input	output
any	any

Set a variable to a value (no output).

> let x = 10

Set a variable to the result of an expression (no output).

> let x = 10 + 100

Set a variable based on the condition (no output).

> let x = if false { -1 } else { 1 }

Set a variable to the output of a pipeline.

> ls | let files

Use let in the middle of a pipeline to assign and pass the value.

> 10 | let x | $x + 5
15

Use let in the middle of a pipeline, then consume value with $in.

> 10 | let x | $in + 5
15

This command is a parser keyword. For details, check: https://www.nushell.sh/book/thinking_in_nu.html