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? ( ? true false -- true/false )
Factor documentation > Factor handbook > The language > Combinators > Conditional combinators
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Vocabulary
kernel

Inputs and outputs
?a generalized boolean
truean object
falsean object
true/falseone two input objects


Word description
Chooses between two values depending on the boolean value of cond.

Definition
IN: kernel

: ? ( ? true false -- true/false ) rot [ drop ] [ nip ] if
; inline