calculate

Evaluate an expression and write the result into a slot. Does not overwrite $ENV.

Syntax

When I calculate "@slot" as "<expression>"

Operators: + - * / % ^ and ( ). Standard precedence (2+3*4 → 14); ^ is right-associative (-2^2 → -4).

Qualifier	Role	Example
`as`	Expression string	`calculate "@line" as "50*3"`

Item	Contract
Element / control shape	None — arithmetic into a slot
How the label binds	First quote is destination slot; expression after `as` is a payload
Qualifiers that change resolve	`as`
Platform	All
Wrong shape → use instead	N/A

When I calculate "@line" as "50*3"
When I calculate "@area" as "2^3"
When I calculate "@tax" as "$TAX_RATE*2"
When I fill "Amount" with "@line"

Inside the expression, @ / @@ / $ tokens are scanned left-to-right.
Substituted display values go through number-only parse. Result is a plain decimal (no currency/commas).
In calculate expressions, * and ^ are arithmetic — not label globs.