9.7 Exiting

► |  | Reference: Racket

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 | Unsafe Operations
17 | Running Racket
| Bibliography
| Index

▼ | 9 | Control Flow

9.1 | Multiple Values
9.2 | Exceptions
9.3 | Delayed Evaluation
9.4 | Continuations
9.5 | Continuation Marks
9.6 | Breaks
9.7 | Exiting

On this page:

exit
exit-handler

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#### 9.7`` Exiting

( exit [v]) → any
v : any/c = #t

Passes v to the current exit handler. If the exit handler does not escape or terminate the thread, #<void> is returned.

( exit-handler) → ( any/c . -> . any)
( exit-handler proc) → void?
proc : ( any/c . -> . any)

A parameter that determines the current exit handler. The exit handler is called by exit.

The default exit handler in the Racket executable takes any argument and shuts down the OS-level Racket process. The argument is used as the OS-level exit code if it is an exact integer between 1 and 255 (which normally means “failure”); otherwise, the exit code is 0, (which normally means “success”).

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