Delete a file
You are encouraged to solve this task according to the task description, using any language you may know.
- Task
Delete a file called "input.txt" and delete a directory called "docs".
This should be done twice: once "here", i.e. in the current working directory and once in the filesystem root.
11l
fs:remove_file(‘output.txt’)
fs:remove_dir(‘docs’)
fs:remove_file(‘/output.txt’)
fs:remove_dir(‘/docs’)
8th
"input.txt" f:rm drop
"/input.txt" f:rm drop
"docs" f:rmdir drop
"/docs" f:rmdir drop
The 'drop' removes the result (true or false, indicating success or failure). It is not strictly necessary to do so, but it keeps the stack clean.
AArch64 Assembly
/* ARM assembly AARCH64 Raspberry PI 3B */
/* program deleteFic64.s */
/*******************************************/
/* Constantes file */
/*******************************************/
/* for this file see task include a file in language AArch64 assembly*/
.include "../includeConstantesARM64.inc"
.equ UNLINK, 35
.equ AT_REMOVEDIR, 0x200 // flag for delete directory
/******************************************/
/* Initialized data */
/******************************************/
.data
szMessDeleteDirOk: .asciz "Delete directory Ok.\n"
szMessErrDeleteDir: .asciz "Unable delete dir. \n"
szMessDeleteFileOk: .asciz "Delete file Ok.\n"
szMessErrDeleteFile: .asciz "Unable delete file. \n"
szNameDir: .asciz "Docs"
szNameFile: .asciz "input.txt"
/******************************************/
/* UnInitialized data */
/******************************************/
.bss
/******************************************/
/* code section */
/******************************************/
.text
.global main
main: // entry of program
// delete file
mov x0,AT_FDCWD // current directory
ldr x1,qAdrszNameFile // file name
mov x8,UNLINK // code call system delete file
svc 0 // call systeme
cmp x0,0 // error ?
blt 99f
ldr x0,qAdrszMessDeleteFileOk // delete file OK
bl affichageMess
// delete directory
mov x0,AT_FDCWD // current directory
ldr x1,qAdrszNameDir // directory name
mov x2,AT_REMOVEDIR
mov x8,UNLINK // code call system delete directory
svc 0 // call systeme
cmp x0,0 // error ?
blt 98f
ldr x0,qAdrszMessDeleteDirOk // display message ok directory
bl affichageMess
// end Ok
b 100f
98: // display error message delete directory
ldr x0,qAdrszMessErrDeleteDir
bl affichageMess
b 100f
99: // display error message delete file
ldr x0,qAdrszMessErrDeleteFile
bl affichageMess
b 100f
100: // standard end of the program
mov x0,0 // return code
mov x8,EXIT // request to exit program
svc 0 // perform the system call
qAdrszMessDeleteDirOk: .quad szMessDeleteDirOk
qAdrszMessErrDeleteDir: .quad szMessErrDeleteDir
qAdrszMessDeleteFileOk: .quad szMessDeleteFileOk
qAdrszNameFile: .quad szNameFile
qAdrszMessErrDeleteFile: .quad szMessErrDeleteFile
qAdrszNameDir: .quad szNameDir
/********************************************************/
/* File Include fonctions */
/********************************************************/
/* for this file see task include a file in language AArch64 assembly */
.include "../includeARM64.inc"
Action!
The attached result has been obtained under DOS 2.5.
PROC Dir(CHAR ARRAY filter)
CHAR ARRAY line(255)
BYTE dev=[1]
Close(dev)
Open(dev,filter,6)
DO
InputSD(dev,line)
PrintE(line)
IF line(0)=0 THEN
EXIT
FI
OD
Close(dev)
RETURN
PROC DeleteFile(CHAR ARRAY fname)
BYTE dev=[1]
Close(dev)
Xio(dev,0,33,0,0,fname)
RETURN
PROC Main()
CHAR ARRAY filter="D:*.*", fname="D:INPUT.TXT"
PrintF("Dir ""%S""%E",filter)
Dir(filter)
PrintF("Delete file ""%S""%E%E",fname)
DeleteFile(fname)
PrintF("Dir ""%S""%E",filter)
Dir(filter)
RETURN
- Output:
Screenshot from Atari 8-bit computer
Dir "D:*.*" DOS SYS 037 DUP SYS 042 INPUT TXT 001 627 FREE SECTORS Delete file "D:INPUT.TXT" Dir "D:*.*" DOS SYS 037 DUP SYS 042 628 FREE SECTORS
Ada
with Ada.Directories; use Ada.Directories;
and then
Delete_File ("input.txt");
Delete_File ("/input.txt");
Delete_Tree ("docs");
Delete_Tree ("/docs");
Naming conventions for the file path are OS-specific. The language does not specify the encoding of the file paths, the directory separators or brackets, the file extension delimiter, the file version delimiter and syntax. The example provided works under Linux and Windows.
Aikido
The remove
function removes either a file or a directory (the directory must be empty for this to work). Exception is thrown if this fails.
remove ("input.txt")
remove ("/input.txt")
remove ("docs")
remove ("/docs")
Aime
remove("input.txt");
remove("/input.txt");
remove("docs");
remove("/docs");
ALGOL 68
The Algol 68 prelude routine "scratch" can only delete temporary files, so we have to resort to running OS commands...
Unfortunately, this is, of course operating system dependant - the sample below is for Windows - the commands and value of root should be changed for your system.
E.g.: for Unix/Linux systems the value of root should be / and the del command replaced-by rm, rmdir by rm -r.
Note Windows rmdir will only delete empty directories.
Additionally, system isn't a standard Algol 68 prelude routine, so this relies on the ALGOL 68 Genie extension.
BEGIN
# note the pathnames and commands are Windows specific - adjust for other systems #
STRING root = "\", del = "del ", rmdir = "rmdir ";
PROC remove file = (STRING file name)INT: system( del + file name );
PROC remove dir = (STRING file name)INT: system(rmdir + file name );
PROC report error = ( STRING message )VOID: print( ( message, newline ) );
IF remove file("input.txt") NE 0 THEN report error( "Unable to remove input.txt" ) FI;
IF remove file(root + "input.txt") NE 0 THEN report error( "Unable to remove " + root + "input.txt" ) FI;
IF remove dir("docs") NE 0 THEN report error( "Unable to remove docs" ) FI;
IF remove dir(root + "docs") NE 0 THEN report error( "Unable to remove " + root + "docs" ) FI
END
ARM Assembly
/* ARM assembly Raspberry PI */
/* program deleteFic.s */
/* REMARK 1 : this program use routines in a include file
see task Include a file language arm assembly
for the routine affichageMess conversion10
see at end of this program the instruction include */
/***************************************************************/
/* File Constantes see task Include a file for arm assembly */
/***************************************************************/
.include "../constantes.inc"
.equ RMDIR, 0x28
.equ UNLINK, 0xA
/******************************************/
/* Initialized data */
/******************************************/
.data
szMessDeleteDirOk: .asciz "Delete directory Ok.\n"
szMessErrDeleteDir: .asciz "Unable delete dir. \n"
szMessDeleteFileOk: .asciz "Delete file Ok.\n"
szMessErrDeleteFile: .asciz "Unable delete file. \n"
szNameDir: .asciz "Docs"
szNameFile: .asciz "input.txt"
/******************************************/
/* UnInitialized data */
/******************************************/
.bss
/******************************************/
/* code section */
/******************************************/
.text
.global main
main: @ entry of program
@ delete file
ldr r0,iAdrszNameFile @ file name
mov r7,#UNLINK @ code call system delete file
svc #0 @ call systeme
cmp r0,#0 @ error ?
blt 99f
ldr r0,iAdrszMessDeleteFileOk @ delete file OK
bl affichageMess
@ delete directory
ldr r0,iAdrszNameDir @ directory name
mov r7, #RMDIR @ code call system delete directory
swi #0 @ call systeme
cmp r0,#0 @ error ?
blt 98f
ldr r0,iAdrszMessDeleteDirOk @ display message ok directory
bl affichageMess
@ end Ok
b 100f
98: @ display error message delete directory
ldr r0,iAdrszMessErrDeleteDir
bl affichageMess
b 100f
99: @ display error message delete file
ldr r0,iAdrszMessErrDeleteFile
bl affichageMess
b 100f
100: @ standard end of the program
mov r0, #0 @ return code
mov r7, #EXIT @ request to exit program
swi 0 @ perform the system call
iAdrszMessDeleteDirOk: .int szMessDeleteDirOk
iAdrszMessErrDeleteDir: .int szMessErrDeleteDir
iAdrszMessDeleteFileOk: .int szMessDeleteFileOk
iAdrszNameFile: .int szNameFile
iAdrszMessErrDeleteFile: .int szMessErrDeleteFile
iAdrszNameDir: .int szNameDir
/***************************************************/
/* ROUTINES INCLUDE */
/***************************************************/
.include "../affichage.inc"
Arturo
file: "input.txt"
docs: "docs"
delete file
delete.directory file
delete join.path ["/" file]
delete.directory join.path ["/" docs]
AutoHotkey
FileDelete, input.txt
FileDelete, \input.txt
FileRemoveDir, docs, 1
FileRemoveDir, \docs, 1
with DllCall
Source: DeleteFile @github by jNizM
DeleteFile(lpFileName)
{
DllCall("Kernel32.dll\DeleteFile", "Str", lpFileName)
}
DeleteFile("C:\Temp\TestFile.txt")
AWK
Assuming we are on a Unix/Linux or at least Cygwin system:
system("rm input.txt")
system("rm /input.txt")
system("rm -rf docs")
system("rm -rf /docs")
Axe
DelVar "appvINPUT"
BASIC
Some versions of Qbasic may have had a builtin RMDIR command. However this is not documented in the manual, so we use the external MSDOS command in this example.
KILL "INPUT.TXT"
KILL "C:\INPUT.TXT"
SHELL "RMDIR /S /Q DIR"
SHELL "RMDIR /S /Q C:\DIR"
Applesoft BASIC
There are disk volumes, but no folders in DOS 3.3.
0 PRINT CHR$ (4)"DELETE INPUT.TXT"
BaCon
BaCon has a DELETE instruction, that accepts FILE|DIRECTORY|RECURSIVE options.
DELETE FILE "input.txt"
DELETE FILE "/input.txt"
Errors can be caught with the CATCH GOTO label instruction (which allows RESUME from the labelled code section).
ZX Spectrum Basic
The ZX Spectrum microdrive had only a main directory, and filenames did not have file extensions. Here we delete the file named INPUTTXT from the first microdrive:
ERASE "m"; 1; "INPUTTXT"
And for disc drive of ZX Spectrum +3:
ERASE "a:INPUTTXT"
BBC BASIC
If the names are known as constants at compile time:
*DELETE input.txt
*DELETE \input.txt
*RMDIR docs
*RMDIR \docs
If the names are known only at run time:
OSCLI "DELETE " + file$
OSCLI "RMDIR " + dir$
IS-BASIC
100 WHEN EXCEPTION USE IOERROR
110 EXT "del input.txt"
120 EXT "del \input.txt"
130 EXT "rmdir docs"
140 EXT "rmdir \docs"
150 END WHEN
160 HANDLER IOERROR
170 PRINT "Error in line";EXLINE
180 PRINT "*** ";EXSTRING$(EXTYPE)
190 CONTINUE
200 END HANDLER
Batch File
del input.txt
rd /s /q docs
del \input.txt
rd /s /q \docs
Beef
using System;
using System.IO;
namespace DeleteFile {
class Program {
static void Main() {
File.Delete("input.txt");
Directory.Delete("docs");
File.Delete("/input.txt");
Directory.Delete("/docs");
}
}
}
BQN
File operations are under the system value •file
in BQN.
•file.Remove "input.txt"
•file.Remove "/input.txt"
•file.RemoveDir "docs"
•file.RemoveDir "/docs"
C
ISO C:
#include <stdio.h>
int main() {
remove("input.txt");
remove("/input.txt");
remove("docs");
remove("/docs");
return 0;
}
POSIX:
#include <unistd.h>
int main() {
unlink("input.txt");
unlink("/input.txt");
rmdir("docs");
rmdir("/docs");
return 0;
}
C#
using System;
using System.IO;
namespace RosettaCode {
class Program {
static void Main() {
try {
File.Delete("input.txt");
Directory.Delete("docs");
File.Delete(@"\input.txt");
Directory.Delete(@"\docs");
} catch (Exception exception) {
Console.WriteLine(exception.Message);
}
}
}
}
C++
#include <cstdio>
#include <direct.h>
int main() {
remove( "input.txt" );
remove( "/input.txt" );
_rmdir( "docs" );
_rmdir( "/docs" );
return 0;
}
Clojure
(import '(java.io File))
(.delete (File. "output.txt"))
(.delete (File. "docs"))
(.delete (new File (str (File/separator) "output.txt")))
(.delete (new File (str (File/separator) "docs")))
COBOL
COBOL 2023 added a dedicated DELETE FILE
statement.
IDENTIFICATION DIVISION.
PROGRAM-ID. Delete-Files.
ENVIRONMENT DIVISION.
INPUT-OUTPUT SECTION.
FILE-CONTROL.
SELECT Local-File ASSIGN TO "input.txt".
SELECT Root-File ASSIGN TO "/input.txt".
DATA DIVISION.
FILE SECTION.
FD Local-File.
01 Local-Record PIC X.
FD Root-File.
01 Root-Record PIC X.
PROCEDURE DIVISION.
DELETE FILE Local-File
DELETE FILE Root-File
GOBACK.
END PROGRAM Delete-Files.
However, in some implementations we need to use unofficial extensions to delete files, or if we want to delete directories. The following are built-in subroutines originally created as part of some of the COBOL products created by Micro Focus.
IDENTIFICATION DIVISION.
PROGRAM-ID. Delete-Files.
PROCEDURE DIVISION.
CALL "CBL_DELETE_FILE" USING "input.txt"
CALL "CBL_DELETE_DIR" USING "docs"
CALL "CBL_DELETE_FILE" USING "/input.txt"
CALL "CBL_DELETE_DIR" USING "/docs"
GOBACK.
END PROGRAM Delete-Files.
Common Lisp
(delete-file (make-pathname :name "input.txt"))
(delete-file (make-pathname :directory '(:absolute "") :name "input.txt"))
To delete directories we need an implementation specific extension. In clisp this is ext:delete-dir.
(let ((path (make-pathname :directory '(:relative "docs"))))
(ext:delete-dir path))
(let ((path (make-pathname :directory '(:absolute "docs"))))
(ext:delete-dir path))
Or you can use the portability library CL-FAD:
(let ((path (make-pathname :directory '(:relative "docs"))))
(cl-fad:delete-directory-and-files path))
Component Pascal
VAR
l: Files.Locator;
BEGIN
(* Locator is the directory *)
l := Files.dir.This("proof");
(* delete 'xx.txt' file, in directory 'proof' *)
Files.dir.Delete(l,"xx.txt");
END ...
D
import std.file: remove;
void main() {
remove("data.txt");
}
import tango.io.Path;
void main() {
remove("input.txt");
remove("/input.txt");
remove("docs");
remove("/docs");
}
POSIX:
import tango.stdc.posix.unistd;
void main() {
unlink("input.txt");
unlink("/input.txt");
rmdir("docs");
rmdir("/docs");
}
Delphi
procedure TMain.btnDeleteClick(Sender: TObject);
var
CurrentDirectory : String;
begin
CurrentDirectory := GetCurrentDir;
DeleteFile(CurrentDirectory + '\input.txt');
RmDir(PChar(CurrentDirectory + '\docs'));
DeleteFile('c:\input.txt');
RmDir(PChar('c:\docs'));
end;
E
<file:input.txt>.delete(null)
<file:docs>.delete(null)
<file:///input.txt>.delete(null)
<file:///docs>.delete(null)
ed
# by Artyom Bologov
# Write nothing to the file.
# That's the best one can do with ed native APIs.
,d
w input.txt
# Invoking the shell.
# More reliable but surrendering to the OS.
!rm input.txt
!rm -r docs/
!rm /input.txt
!rm -r /docs/
Q
Elena
ELENA 4.x :
import system'io;
public program()
{
File.assign("output.txt").delete();
File.assign("\output.txt").delete();
Directory.assign("docs").delete();
Directory.assign("\docs").delete();
}
Elixir
File.rm!("input.txt")
File.rmdir!("docs")
File.rm!("/input.txt")
File.rmdir!("/docs")
Emacs Lisp
(delete-file "input.txt")
(delete-directory "docs")
(delete-file "/input.txt")
(delete-directory "/docs")
Erlang
-module(delete).
-export([main/0]).
main() ->
% current directory
ok = file:del_dir( "docs" ),
ok = file:delete( "input.txt" ),
% root directory
ok = file:del_dir( "/docs" ),
ok = file:delete( "/input.txt" ).
F#
open System.IO
[<EntryPoint>]
let main argv =
let fileName = "input.txt"
let dirName = "docs"
for path in ["."; "/"] do
ignore (File.Delete(Path.Combine(path, fileName)))
ignore (Directory.Delete(Path.Combine(path, dirName)))
0
Factor
"docs" "/docs" [ delete-tree ] bi@
"input.txt" "/input.txt" [ delete-file ] bi@
Forth
There is no means to delete directories in ANS Forth.
s" input.txt" delete-file throw
s" /input.txt" delete-file throw
Fortran
Fortran 90
OPEN (UNIT=5, FILE="input.txt", STATUS="OLD") ! Current directory
CLOSE (UNIT=5, STATUS="DELETE")
OPEN (UNIT=5, FILE="/input.txt", STATUS="OLD") ! Root directory
CLOSE (UNIT=5, STATUS="DELETE")
Intel Fortran on Windows
Use Intel Fortran bindings to the Win32 API. Here we are using the DeleteFileA and RemoveDirectoryA functions.
program DeleteFileExample
use kernel32
implicit none
print *, DeleteFile("input.txt")
print *, DeleteFile("\input.txt")
print *, RemoveDirectory("docs")
print *, RemoveDirectory("\docs")
end program
Free Pascal
All required functions already exist in the RTL’s (run-time library) system
unit which is shipped with every FPC (Free Pascal compiler) distribution and automatically included by every program.
program deletion(input, output, stdErr);
const
rootDirectory = '/'; // might have to be altered for other platforms
inputTextFilename = 'input.txt';
docsFilename = 'docs';
var
fd: file;
begin
assign(fd, inputTextFilename);
erase(fd);
rmDir(docsFilename);
assign(fd, rootDirectory + inputTextFilename);
erase(fd);
rmDir(rootDirectory + docsFilename);
end.
Note, depending on the {$IOChecks}
compiler switch state, run-time error generation is inserted.
In particular deletion of non-existent files or lack of privileges may cause an abort.
More convenient routines are sysUtils.deleteFile
and sysUtils.removeDir
.
Both accept strings and just return, whether the operation was successful.
FreeBASIC
' FB 1.05.0 Win64
' delete file and empty sub-directory in current directory
Kill "input.txt"
RmDir "docs"
' delete file and empty sub-directory in root directory c:\
' deleting file in root requires administrative privileges in Windows 10
'Kill "c:\input.txt"
'RmDir "c:\docs"
Print "Press any key to quit"
Sleep
Furor
###sysinclude dir.uh
// ===================
argc 3 < { #s ."Usage: " 0 argv print SPACE 1 argv print ." filename\n" end }
2 argv 'e !istrue { #s ."The given file ( " 2 argv print ." ) doesn't exist!\n" end }
2 argv removefile
end
Usage: furor removefile.upu filename
###sysinclude dir.uh
#g argc 3 < { ."Usage: " #s 0 argv print SPACE 1 argv print SPACE ."unnecessary_directory\n" end }
2 argv 'd !istrue { ."The given directory doesn't exist! Exited.\n" }{
2 argv rmdir
}
end
Usage: furor rmdir.upu unnecessary_directory
Peri
###sysinclude standard.uh
###sysinclude args.uh
###sysinclude str.uh
###sysinclude io.uh
// ===================
#g argc 3 < { #s ."Usage: " 0 argv print SPACE 1 argv print ." filename\n" end }
2 argv 'e inv istrue { #s ."The given file ( " 2 argv print ." ) doesn't exist!\n" end }
2 argv removefile
end
Usage: peri removefile.upu filename
###sysinclude standard.uh
###sysinclude args.uh
###sysinclude str.uh
###sysinclude io.uh
#g argc 3 < { ."Usage: " #s 0 argv print SPACE 1 argv print SPACE ."unnecessary_directory\n" end }
2 argv 'd inv istrue { ."The given directory doesn't exist! Exited.\n" }{
2 argv rmdir
}
end
Usage: peri rmdir.upu unnecessary_directory
FutureBasic
include "NSLog.incl"
CFURLRef url
url = fn URLFileURLWithPath( fn StringByExpandingTildeInPath( @"~/Desktop/input.txt" ) )
if (fn FileManagerRemoveItemAtURL( url ) )
NSLog( @"File \"intput.txt\" deleted." )
else
NSLog( @"Unable to delete file \"input.txt\"." )
end if
url = fn URLFileURLWithPath( fn StringByExpandingTildeInPath( @"~/Desktop/docs" ) )
if (fn FileManagerRemoveItemAtURL( url ) )
NSLog( @"Directory \"docs\" deleted." )
else
NSLog( @"Unabled to delete directory \"docs\"." )
end if
HandleEvents
Gambas
Public Sub Main()
Kill User.home &/ "input.txt"
Rmdir User.home &/ "docs"
'Administrative privileges (sudo) would be required to mess about in Root - I'm not going there!
End
GAP
# Apparently GAP can only remove a file, not a directory
RemoveFile("input.txt");
# true
RemoveFile("docs");
# fail
Go
package main
import "os"
func main() {
os.Remove("input.txt")
os.Remove("/input.txt")
os.Remove("docs")
os.Remove("/docs")
// recursively removes contents:
os.RemoveAll("docs")
os.RemoveAll("/docs")
}
Groovy
On most *nix systems, this must be run as sudo for the files in root to be deleted. If you don't have permissions, it will silently fail to delete those files. I would recommend against running anything you find on the internet as sudo.
// Gets the first filesystem root. On most systems this will be / or c:\
def fsRoot = File.listRoots().first()
// Create our list of files (including directories)
def files = [
new File("input.txt"),
new File(fsRoot, "input.txt"),
new File("docs"),
new File(fsRoot, "docs")
]
/*
We use it.directory to determine whether each file is a regular file or directory. If it is a directory, we delete
it with deleteDir(), otherwise we just use delete().
*/
files.each{
it.directory ? it.deleteDir() : it.delete()
}
Haskell
import System.IO
import System.Directory
main = do
removeFile "output.txt"
removeDirectory "docs"
removeFile "/output.txt"
removeDirectory "/docs"
HicEst
SYSTEM(DIR="docs") ! create docs in current directory (if not existent), make it current
OPEN (FILE="input.txt", "NEW") ! in current directory = docs
WRITE(FIle="input.txt", DELETE=1) ! no command to DELETE a DIRECTORY in HicEst
SYSTEM(DIR="C:\docs") ! create C:\docs (if not existent), make it current
OPEN (FILE="input.txt", "NEW") ! in current directory = C:\docs
WRITE(FIle="input.txt", DELETE=1)
Icon and Unicon
Icon supports 'remove' for files.
every dir := !["./","/"] do {
remove(f := dir || "input.txt") |stop("failure for file remove ",f)
rmdir(f := dir || "docs") |stop("failure for directory remove ",f)
}
Note Icon and Unicon accept both / and \ for directory separators.
Io
Directory fileNamed("input.txt") remove
Directory directoryNamed("docs") remove
RootDir := Directory clone setPath("/")
RootDir fileNamed("input.txt") remove
RootDir directoryNamed("docs") remove
or
File with("input.txt") remove
Directory with("docs") remove
File with("/input.txt") remove
Directory with("/docs") remove
J
The J standard library comes with a set of file access utilities.
load 'files'
ferase 'input.txt'
ferase '\input.txt'
ferase 'docs'
ferase '\docs'
NB. Or all at once...
ferase 'input.txt';'/input.txt';'docs';'/docs'
The function above actually uses a foreign conjunction and defined in the files library like so:
NB. =========================================================
NB.*ferase v erases a file
NB. Returns 1 if successful, otherwise _1
ferase=: (1!:55 :: _1:) @ (fboxname &>) @ boxopen
This means that you can directly erase files and directories without loading the files library.
1!:55 <'input.txt'
1!:55 <'\input.txt'
1!:55 <'docs'
1!:55 <'\docs'
Java
import java.io.File;
public class FileDeleteTest {
public static boolean deleteFile(String filename) {
boolean exists = new File(filename).delete();
return exists;
}
public static void test(String type, String filename) {
System.out.println("The following " + type + " called " + filename +
(deleteFile(filename) ? " was deleted." : " could not be deleted.")
);
}
public static void main(String args[]) {
test("file", "input.txt");
test("file", File.seperator + "input.txt");
test("directory", "docs");
test("directory", File.seperator + "docs" + File.seperator);
}
}
Using Java version 11
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
public final class DeleteAFile {
public static void main(String[] args) throws IOException {
Files.delete(Path.of("output.txt"));
Files.delete(Path.of("docs"));
Files.delete(Path.of("/output.txt"));
Files.delete(Path.of("/docs"));
}
}
JavaScript
var fso = new ActiveXObject("Scripting.FileSystemObject");
fso.DeleteFile('input.txt');
fso.DeleteFile('c:/input.txt');
fso.DeleteFolder('docs');
fso.DeleteFolder('c:/docs');
or
var fso = new ActiveXObject("Scripting.FileSystemObject");
var f;
f = fso.GetFile('input.txt');
f.Delete();
f = fso.GetFile('c:/input.txt');
f.Delete();
f = fso.GetFolder('docs');
f.Delete();
f = fso.GetFolder('c:/docs');
f.Delete();
Synchronous
const fs = require('fs');
fs.unlinkSync('myfile.txt');
Asynchronous
const fs = require('fs');
fs.unlink('myfile.txt', ()=>{
console.log("Done!");
})
Joy
"input.txt" fremove
"docs" fremove
"/input.txt" fremove
"/docs" fremove.
Julia
# Delete a file
rm("input.txt")
# Delete a directory
rm("docs", recursive = true)
Kotlin
// version 1.0.6
/* testing on Windows 10 which needs administrative privileges
to delete files from the root */
import java.io.File
fun main(args: Array<String>) {
val paths = arrayOf("input.txt", "docs", "c:\\input.txt", "c:\\docs")
var f: File
for (path in paths) {
f = File(path)
if (f.delete())
println("$path successfully deleted")
else
println("$path could not be deleted")
}
}
- Output:
input.txt successfully deleted docs successfully deleted c:\input.txt successfully deleted c:\docs successfully deleted
Running program again after files have been deleted:
- Output:
input.txt could not be deleted docs could not be deleted c:\input.txt could not be deleted c:\docs could not be deleted
LabVIEW
This image is a VI Snippet, an executable image of LabVIEW code. The LabVIEW version is shown on the top-right hand corner. You can download it, then drag-and-drop it onto the LabVIEW block diagram from a file browser, and it will appear as runnable, editable code.
Lang
# Load the IO module
# Replace "<pathToIO.lm>" with the location where the io.lm Lang module was installed to without "<" and ">"
ln.loadModule(<pathToIO.lm>)
$file1 = [[io]]::fp.openFile(input.txt)
[[io]]::fp.delete($file1)
[[io]]::fp.closeFile($file1)
$file2 = [[io]]::fp.openFile(/input.txt)
[[io]]::fp.delete($file2)
[[io]]::fp.closeFile($file2)
$dir1 = [[io]]::fp.openFile(docs)
[[io]]::fp.delete($dir1)
[[io]]::fp.closeFile($dir1)
$dir2 = [[io]]::fp.openFile(/docs)
[[io]]::fp.delete($dir2)
[[io]]::fp.closeFile($dir2)
Lasso
// delete file
local(f = file('input.txt'))
#f->delete
// delete directory
// directory must be empty before it can be successfully deleted. A failure is generated if the operation fails.
local(d = dir('docs'))
#d->delete
// delete file in root file system (requires permissions at user OS level)
local(f = file('//input.txt'))
#f->delete
// delete directory in root file system (requires permissions at user OS level)
// directory must be empty before it can be successfully deleted. A failure is generated if the operation fails.
local(d = file('//docs'))
#d->delete
Liberty BASIC
' show where we are
print DefaultDir$
' in here
kill "input.txt"
result=rmdir("Docs")
' from root
kill "\input.txt"
result=rmdir("\Docs")
Lingo
Delete file "input.txt" in cwd:
-- note: fileIO xtra is shipped with Director, i.e. an "internal"
fp = xtra("fileIO").new()
fp.openFile("input.txt", 0)
fp.delete()
Delete file "input.txt" in root of current volume:
-- note: fileIO xtra is shipped with Director, i.e. an "internal"
pd = the last char of _movie.path -- "\" for win, ":" for mac
_player.itemDelimiter = pd
vol = _movie.path.item[1]
fp = xtra("fileIO").new()
fp.openFile(vol&pd&"input.txt", 0)
fp.delete()
Deleting a directory requires a 3rd party xtra, but there are various free xtras that allow this. Here as example usage of BinFile xtra:
-- delete (empty) directory "docs" in cwd
bx_folder_delete("docs")
-- delete (empty) directory "docs" in root of current volume
pd = the last char of _movie.path -- "\" for win, ":" for mac
_player.itemDelimiter = pd
vol = _movie.path.item[1]
bx_folder_delete(vol&pd&"docs")
Locomotive Basic
|era,"input.txt"
(AMSDOS RSX command, therefore prefixed with a vertical bar. Also, there are no subdirectories in AMSDOS.)
Logo
UCB Logo has no means to delete directories.
erasefile "input.txt
erasefile "/input.txt
Lua
os.remove("input.txt")
os.remove("/input.txt")
os.remove("docs")
os.remove("/docs")
Maple
FileTools:-Remove("input.txt");
FileTools:-RemoveDirectory("docs");
FileTools:-Remove("/input.txt");
FileTools:-RemoveDirectory("/docs");
Mathematica / Wolfram Language
wd = NotebookDirectory[];
DeleteFile[wd <> "input.txt"]
DeleteFile["/" <> "input.txt"]
DeleteDirectory[wd <> "docs"]
DeleteDirectory["/" <> "docs"]
MATLAB / Octave
delete('input.txt'); % delete local file input.txt
delete('/input.txt'); % delete file /input.txt
rmdir('docs'); % remove local directory docs
rmdir('/docs'); % remove directory /docs
On Unix-Systems:
if system('rm input.txt') == 0
disp('input.txt removed')
end
if system('rm /input.txt') == 0
disp('/input.txt removed')
end
if system('rmdir docs') == 0
disp('docs removed')
end
if system('rmdir /docs') == 0
disp('/docs removed')
end
MAXScript
There's no way to delete folders in MAXScript
-- Here
deleteFile "input.txt"
-- Root
deleteFile "\input.txt"
Mercury
:- module delete_file.
:- interface.
:- import_module io.
:- pred main(io::di, io::uo) is det.
:- implementation.
main(!IO) :-
io.remove_file("input.txt", _, !IO),
io.remove_file("/input.txt", _, !IO),
io.remove_file("docs", _, !IO),
io.remove_file("/docs", _, !IO).
Nanoquery
f = new(Nanoquery.IO.File)
f.delete("input.txt")
f.delete("docs")
f.delete("/input.txt")
f.delete("/docs")
Nemerle
using System;
using System.IO;
using System.Console;
module DeleteFile
{
Main() : void
{
when (File.Exists("input.txt")) File.Delete("input.txt");
try {
when (File.Exists(@"\input.txt")) File.Delete(@"\input.txt");
}
catch {
|e is UnauthorizedAccessException => WriteLine(e.Message)
}
when (Directory.Exists("docs")) Directory.Delete("docs");
when (Directory.Exists(@"\docs")) Directory.Delete(@"\docs");
}
}
NetRexx
/* NetRexx */
options replace format comments java crossref symbols binary
runSample(arg)
return
-- . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
method isFileDeleted(fn) public static returns boolean
ff = File(fn)
fDeleted = ff.delete()
return fDeleted
-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
method runSample(arg) private static
parse arg files
if files = '' then files = 'input.txt F docs D /input.txt F /docs D'
loop while files.length > 0
parse files fn ft files
select case(ft.upper())
when 'F' then do
ft = 'File'
end
when 'D' then do
ft = 'Directory'
end
otherwise do
ft = 'File'
end
end
if isFileDeleted(fn) then dl = 'deleted'
else dl = 'not deleted'
say ft ''''fn'''' dl
end
return
NewLISP
(delete-file "input.txt")
(delete-file "/input.txt")
(remove-dir "docs")
(remove-dir "/docs")
Nim
import os
removeFile("input.txt")
removeFile("/input.txt")
removeDir("docs")
removeDir("/docs")
Objeck
use IO;
bundle Default {
class FileExample {
function : Main(args : String[]) ~ Nil {
File->Delete("output.txt");
File->Delete("/output.txt");
Directory->Delete("docs");
Directory->Delete("/docs");
}
}
}
Objective-C
NSFileManager *fm = [NSFileManager defaultManager];
// Pre-OS X 10.5
[fm removeFileAtPath:@"input.txt" handler:nil];
[fm removeFileAtPath:@"/input.txt" handler:nil];
[fm removeFileAtPath:@"docs" handler:nil];
[fm removeFileAtPath:@"/docs" handler:nil];
// OS X 10.5+
[fm removeItemAtPath:@"input.txt" error:NULL];
[fm removeItemAtPath:@"/input.txt" error:NULL];
[fm removeItemAtPath:@"docs" error:NULL];
[fm removeItemAtPath:@"/docs" error:NULL];
OCaml
Sys.remove "input.txt";;
Sys.remove "/input.txt";;
Sys.rmdir "docs";;
Sys.rmdir "/docs";;
with the Unix library:
#load "unix.cma";;
Unix.unlink "input.txt";;
Unix.unlink "/input.txt";;
Unix.rmdir "docs";;
Unix.rmdir "/docs";;
ooRexx
/*REXX pgm deletes a file */
file= 'afile.txt' /*name of a file to be deleted.*/
res=sysFileDelete(file); Say file 'res='res
File= 'bfile.txt' /*name of a file to be deleted.*/
res=sysFileDelete(file); Say file 'res='res
- Output:
afile.txt res=0 bfile.txt res=2
Oz
for Dir in ["/" "./"] do
try {OS.unlink Dir#"output.txt"}
catch _ then {System.showInfo "File does not exist."} end
try {OS.rmDir Dir#"docs"}
catch _ then {System.showInfo "Directory does not exist."} end
end
PARI/GP
GP has no built-in facilities for deleting files, but can use a system call:
system("rm -rf docs");
system("rm input.txt");
system("rm -rf /docs");
system("rm /input.txt");
PARI, as usual, has access to all the standard C methods.
Pascal
See Delphi or Free Pascal
Perl
use File::Spec::Functions qw(catfile rootdir);
# here
unlink 'input.txt';
rmdir 'docs';
# root dir
unlink catfile rootdir, 'input.txt';
rmdir catfile rootdir, 'docs';
Without Perl Modules
Current directory
perl -e 'unlink input.txt' perl -e 'rmdir docs'
Root Directory
perl -e 'unlink "/input.txt"' perl -e 'rmdir "/docs"'
Phix
without js -- (file i/o) constant root = iff(platform()=LINUX?"/":"C:\\") ?delete_file("input.txt") ?delete_file(root&"input.txt") ?remove_directory("docs") ?remove_directory(root&"docs")
output is 0 0 0 0 or 1 1 1 1 or some combination thereof
PHP
<?php
unlink('input.txt');
unlink('/input.txt');
rmdir('docs');
rmdir('/docs');
?>
Picat
import os.
del(Arg), directory(Arg) =>
rmdir(Arg).
del(Arg), file(Arg) =>
rm(Arg).
main(Args) =>
foreach (Arg in Args)
del(Arg)
end.
- Output:
picat delete_file.pi input.txt docs/ /input.txt /docs/
PicoLisp
(call 'rm "input.txt")
(call 'rmdir "docs")
(call 'rm "/input.txt")
(call 'rmdir "/docs")
Pike
int main(){
rm("input.txt");
rm("/input.txt");
rm("docs");
rm("/docs");
}
Plain English
To run:
Start up.
\ In the current working directory
Destroy ".\input.txt" in the file system.
Destroy ".\docs\" in the file system.
\ In the filesystem root
Destroy "C:\input.txt" in the file system.
Destroy "C:\docs\" in the file system.
Shut down.
PowerShell
# possible aliases for Remove-Item: rm, del, ri
Remove-Item input.txt
Remove-Item \input.txt # file system root
Remove-Item -Recurse docs # recurse for deleting folders including content
Remove-Item -Recurse \docs
ProDOS
Because input.txt is located inside of "docs" this will delete it when it deletes "docs"
deletedirectory docs
PureBasic
DeleteFile("input.txt")
DeleteDirectory("docs","") ; needs to delete all included files
DeleteFile("/input.txt")
DeleteDirectory("/docs","*.*") ; deletes all files according to a pattern
DeleteDirectory("/docs","",#PB_FileSystem_Recursive) ; deletes all files and directories recursive
Python
import os
# current directory
os.remove("output.txt")
os.rmdir("docs")
# root directory
os.remove("/output.txt")
os.rmdir("/docs")
If you wanted to remove a directory and all its contents, recursively, you would do:
import shutil
shutil.rmtree("docs")
R
file.remove("input.txt")
file.remove("/input.txt")
# or
file.remove("input.txt", "/input.txt")
# or
unlink("input.txt"); unlink("/input.txt")
# directories needs the recursive flag
unlink("docs", recursive = TRUE)
unlink("/docs", recursive = TRUE)
The function unlink allows wildcards (* and ?)
Racket
#lang racket
;; here
(delete-file "input.txt")
(delete-directory "docs")
(delete-directory/files "docs") ; recursive deletion
;; in the root
(delete-file "/input.txt")
(delete-directory "/docs")
(delete-directory/files "/docs")
;; or in the root with relative paths
(parameterize ([current-directory "/"])
(delete-file "input.txt")
(delete-directory "docs")
(delete-directory/files "docs"))
Raku
(formerly Perl 6)
unlink 'input.txt';
unlink '/input.txt';
rmdir 'docs';
rmdir '/docs';
Raven
'input.txt' delete
'/input.txt' delete
'docs' rmdir
'/docs' rmdir
REBOL
; Local.
delete %input.txt
delete-dir %docs/
; Root.
delete %/input.txt
delete-dir %/docs/
Retro
'input.txt file:delete
'/input.txt file:delete
REXX
Note that this REXX program will work on the Next family of Microsoft Windows systems as well as DOS (both under Windows in a DOS-prompt window or stand-alone DOS).
/*REXX program deletes a file and a folder in the current directory and the root. */
trace off /*suppress REXX error messages from DOS*/
aFile= 'input.txt' /*name of a file to be deleted. */
aDir = 'docs' /*name of a folder to be removed. */
do j=1 for 2 /*perform this DO loop exactly twice.*/
'ERASE' aFile /*erase this file in the current dir. */
'RMDIR' "/s /q" aDir /*remove the folder " " " " */
if j==1 then 'CD \' /*make the current dir the root dir.*/
end /* [↑] just do CD \ command once.*/
/*stick a fork in it, we're all done. */
Ring
remove("output.txt")
system("rmdir docs")
RPL
There is a unique RPL instruction to delete both files and directories. Directories must be empty to be deletable.
'output.txt' PURGE 'docs' PURGE HOME output.txt' PURGE HOME 'docs' PURGE
Basically, HOME
moves the user from the current directory to the root. If the last two commands are done successively, only the first call is necessary.
Ruby
File.delete("output.txt", "/output.txt")
Dir.delete("docs")
Dir.delete("/docs")
Run BASIC
'------ delete input.txt ----------------
kill "input.txt" ' this is where we are
kill "/input.txt" ' this is the root
' ---- delete directory docs ----------
result = rmdir("Docs") ' directory where we are
result = rmdir("/Docs") ' root directory
Rust
use std::io::{self, Write};
use std::fs::{remove_file,remove_dir};
use std::path::Path;
use std::{process,display};
const FILE_NAME: &'static str = "output.txt";
const DIR_NAME : &'static str = "docs";
fn main() {
delete(".").and(delete("/"))
.unwrap_or_else(|e| error_handler(e,1));
}
fn delete<P>(root: P) -> io::Result<()>
where P: AsRef<Path>
{
remove_file(root.as_ref().join(FILE_NAME))
.and(remove_dir(root.as_ref().join(DIR_NAME)))
}
fn error_handler<E: fmt::Display>(error: E, code: i32) -> ! {
let _ = writeln!(&mut io::stderr(), "{:?}", error);
process::exit(code)
}
Scala
import java.util._
import java.io.File
object FileDeleteTest extends App {
def deleteFile(filename: String) = { new File(filename).delete() }
def test(typ: String, filename: String) = {
System.out.println("The following " + typ + " called " + filename +
(if (deleteFile(filename)) " was deleted." else " could not be deleted."))
}
test("file", "input.txt")
test("file", File.separatorChar + "input.txt")
test("directory", "docs")
test("directory", File.separatorChar + "docs" + File.separatorChar)
}
Scheme
(delete-file filename)
Seed7
The library osfiles.s7i provides the functions removeFile and removeTree. RemoveFile removes a file of any type unless it is a directory that is not empty. RemoveTree remove a file of any type inclusive a directory tree. Note that removeFile and removeTree fail with the exception FILE_ERROR when the file does not exist.
$ include "seed7_05.s7i";
include "osfiles.s7i";
const proc: main is func
begin
removeFile("input.txt");
removeFile("/input.txt");
removeTree("docs");
removeTree("/docs");
end func;
SenseTalk
// Delete locally (relative to "the folder")
delete file "input.txt"
delete folder "docs"
// Delete at the file system root
delete file "/input.txt"
delete folder "/docs"
Sidef
# here
%f'input.txt' -> delete;
%d'docs' -> delete;
# root dir
Dir.root + %f'input.txt' -> delete;
Dir.root + %d'docs' -> delete;
Slate
(It will succeed deleting the directory if it is empty)
(File newNamed: 'input.txt') delete.
(File newNamed: '/input.txt') delete.
(Directory newNamed: 'docs') delete.
(Directory newNamed: '/docs') delete.
Also:
(Directory current / 'input.txt') delete.
(Directory root / 'input.txt') delete.
Smalltalk
(It will succeed deleting the directory if it is empty)
File remove: 'input.txt'.
File remove: 'docs'.
File remove: '/input.txt'.
File remove: '/docs'
Standard ML
OS.FileSys.remove "input.txt";
OS.FileSys.remove "/input.txt";
OS.FileSys.rmDir "docs";
OS.FileSys.rmDir "/docs";
Stata
erase input.txt
rmdir docs
Tcl
file delete input.txt /input.txt
# preserve directory if non-empty
file delete docs /docs
# delete even if non-empty
file delete -force docs /docs
Toka
needs shell
" docs" remove
" input.txt" remove
TUSCRIPT
$$ MODE TUSCRIPT
- delete file
SET status = DELETE ("input.txt")
- delete directory
SET status = DELETE ("docs",-std-)
UNIX Shell
rm -rf docs
rm input.txt
rm -rf /docs
rm /input.txt
Ursa
decl file f
f.delete "input.txt"
f.delete "docs"
f.delete "/input.txt"
f.delete "/docs"
VAX Assembly
74 75 70 6E 69 20 65 74 65 6C 65 64 0000 1 dcl: .ascii "delete input.txt;,docs.dir;"
64 2E 73 63 6F 64 2C 3B 74 78 74 2E 000C
3B 72 69 0018
69 76 65 64 73 79 73 24 73 79 73 2C 001B 2 .ascii ",sys$sysdevice:[000000]input.txt;"
69 5D 30 30 30 30 30 30 5B 3A 65 63 0027
3B 74 78 74 2E 74 75 70 6E 0033
69 76 65 64 73 79 73 24 73 79 73 2C 003C 3 .ascii ",sys$sysdevice:[000000]docs.dir;"
64 5D 30 30 30 30 30 30 5B 3A 65 63 0048
3B 72 69 64 2E 73 63 6F 0054
005C 4
0000005C 005C 5 desc: .long .-dcl ;character count
00000000' 0060 6 .address dcl
0064 7
0000 0064 8 .entry main,0
F3 AF 7F 0066 9 pushaq desc
00000000'GF 01 FB 0069 10 calls #1, g^lib$do_command ;execute shell command
04 0070 11 ret
0071 12 .end main
VBA
Option Explicit
Sub DeleteFileOrDirectory()
Dim myPath As String
myPath = "C:\Users\surname.name\Desktop\Docs"
'delete file
Kill myPath & "\input.txt"
'delete Directory
RmDir myPath
End Sub
VBScript
Set oFSO = CreateObject( "Scripting.FileSystemObject" )
oFSO.DeleteFile "input.txt"
oFSO.DeleteFolder "docs"
oFSO.DeleteFile "\input.txt"
oFSO.DeleteFolder "\docs"
'Using Delete on file and folder objects
dim fil, fld
set fil = oFSO.GetFile( "input.txt" )
fil.Delete
set fld = oFSO.GetFolder( "docs" )
fld.Delete
set fil = oFSO.GetFile( "\input.txt" )
fil.Delete
set fld = oFSO.GetFolder( "\docs" )
fld.Delete
Vedit macro language
Vedit allows using either '\' or '/' as directory separator character, it is automatically converted to the one used by the operating system.
// In current directory
File_Delete("input.txt", OK)
File_Rmdir("docs")
// In the root directory
File_Delete("/input.txt", OK)
File_Rmdir("/docs")
Visual Basic .NET
Platform: .NET
'Current Directory
IO.Directory.Delete("docs")
IO.Directory.Delete("docs", True) 'also delete files and sub-directories
IO.File.Delete("output.txt")
'Root
IO.Directory.Delete("\docs")
IO.File.Delete("\output.txt")
'Root, platform independent
IO.Directory.Delete(IO.Path.DirectorySeparatorChar & "docs")
IO.File.Delete(IO.Path.DirectorySeparatorChar & "output.txt")
V (Vlang)
import os
fn main() {
os.rm("./input.txt") or {println(err) exit(-1)}
os.rmdir("./docs") or {println(err) exit(-2)} // os.rmdir_all, recursively removes specified directory
// check if file exists
if os.is_file("./input.txt") == true {println("Found file!")}
else {println("File was not found!")}
// check if directory exists
if os.is_dir("./docs") == true {println("Found directory!")}
else {println("Directory was not found!")}
}
Wren
To remove a file from the root, assuming you have the necessary privileges, just change "input.txt" to "/input.txt" in the following script.
Wren does not currently support the removal of directories.
import "io" for File
File.delete("input.txt")
// check it worked
System.print(File.exists("input.txt"))
- Output:
false
X86 Assembly
;syscall numbers for readability. :]
%define sys_rmdir 40
%define sys_unlink 10
section .text
global _start
_start:
mov ebx, fn
mov eax, sys_unlink
int 0x80
test eax, eax
js _ragequit
mov ebx, dn
mov eax, sys_rmdir
int 0x80
mov ebx, rfn
mov eax, sys_unlink
int 0x80
cmp eax, 0
je _exit
_ragequit:
mov edx, err_len
mov ecx, err_msg
mov ebx, 4
mov eax ,1
int 0x80
_exit:
push 0x1
mov eax, 1
push eax
int 0x80
ret
section .data
fn db 'input.txt',0
rfn db '/input.txt',0
dn db 'doc',0
err_msg db "Something went wrong! :[",0xa
err_len equ $-err_msg
Yorick
Yorick does not have a built-in function to recursively delete a directory; the rmdir function only works on empty directories.
remove, "input.txt";
remove, "/input.txt";
rmdir, "docs";
rmdir, "/docs";
Zig
const std = @import("std");
const fs = std.fs;
pub fn main() !void {
const here = fs.cwd();
try here.deleteFile("input.txt");
try here.deleteDir("docs");
const root = try fs.openDirAbsolute("/", .{});
try root.deleteFile("input.txt");
try root.deleteDir("docs");
}
zkl
zkl doesn't have built ins to delete files or directories but you can let a shell do it:
zkl: System.cmd((System.isWindows and "del" or "unlink") + " input.txt")
0
zkl: System.cmd((System.isWindows and "del" or "unlink") + " /input.txt")
unlink: cannot unlink ‘/input.txt’: No such file or directory
256
zkl: System.cmd("rmdir docs")
rmdir: failed to remove ‘docs’: Directory not empty
256
zkl: System.cmd("rm -r docs")
0
zkl: System.cmd("rm -r /docs")
rm: cannot remove ‘/docs’: No such file or directory
256
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