3.18 Void and Undefined

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▼ | 3 | Datatypes

3.1 | Booleans and Equality
3.2 | Numbers
3.3 | Strings
3.4 | Byte Strings
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3.17 | Procedures
3.18 | Void and Undefined

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void?
void

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#### 3.18`` 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.

The #<void> value is always eq? to itself, and the #<undefined> value is also eq? to itself.

> procedure (void? v) → void?
> v : any/c

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

> procedure (void v ...) → void?
> v : any/c

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