{ } — Dfn / Dop

{…} defines a function of ⍺ and ⍵, or an operator when it uses ⍶ or ⍹. ; separates its bodies. When a predicate C? is false, evaluation moves on to the next body. The last statement gives the result. See Dfns.

{⍵×2}3             ⍝ 6
2{⍺+⍵}3            ⍝ 5
{⍵<0?-⍵;⍵}¯3       ⍝ 3