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Idiom #106 Get program working directory

Assign to string dir the path of the working directory.
(This is not necessarily the folder containing the executable itself)

dir = Dir.pwd
with Ada.Directories; use Ada.Directories;
Dir : String := Current_Directory;
#include <unistd.h>
char *dir = getcwd(NULL, 0);
#include <filesystem>
dir = std::filesystem::current_path();
using System.IO;
string path = Directory.GetCurrentDirectory();
import std.path;
string dir = absolutePath;
import "os"
dir, err := os.Getwd()
import System.Directory
dir <- getCurrentDirectory
let dir = process.cwd ()
String path = this.getClass().getClassLoader().getResource("").getPath();
dir = os.getenv("PWD") or io.popen("cd"):read()
$dir = getcwd();
dir := expandfilename('.');
use Cwd;
my $dir = getcwd();
import os
dir = os.getcwd()
use std::env;
let dir = env::current_dir().unwrap();

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