mut for core

Signature

> mut {flags} (var_name) (initial_value)

Parameters

• var_name: The mutable variable name to create.
• initial_value: Equals sign followed by value.

Input/output types:

Examples

Set a mutable variable to a value, then update it.

> mut x = 10; $x = 12

Upsert a value inside a mutable data structure.

> mut a = {b:{c:1}}; $a.b.c = 2

Set a mutable variable to the result of an expression.

> mut x = 10 + 100

Set a mutable variable based on the condition.

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

Notes

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