Reference: PLT Scheme

1`` | Language Model
2`` | Syntactic Forms
3`` | Datatypes
4`` | Structures
5`` | Classes and Objects
6`` | Units
7`` | Contracts
8`` | Pattern Matching
9`` | Control Flow
10`` | Concurrency
11`` | Macros
12`` | Input and Output
13`` | Reflection and Security
14`` | Operating System
15`` | Memory Management
16`` | Running PLT Scheme
| Bibliography
| Index

On this page:

void?
void

Version: 4.0.2
contents index
← prev up next →

#### 3.17`` Void and Undefined

The constant #<void> is returned by most forms and procedures that have a side-effect and no useful result. The constant #<undefined> is used as the initial value for letrec bindings.

(void? v) → void?
v : any/c

Returns #t if v is the constant #<void>, #f otherwise.

(void v ...) → void?
v : any/c

Returns the constant #<void>. Each v argument is ignored.

contents index
← prev up next →