File Imports - language feature

Example from Java, Pizza, Oracle Java, Deesel:

import javax.swing.*;
import javax.swing.JOptionPane;
// use fully qualified name without import:
javax.swing.JOptionPane.showMessageDialog(null, "Hi");
// There are 166 packages containing 3279 classes and interfaces in Java 5.
// import java.io.*; Input-output classes.

Example from JavaScript:

import { helloWorld } from "./helloWorld.js";

Example from Python, Cython:

import datetime
oTime = datetime.datetime.now()
from my_pkg import my_funcs

Example from C, C++, Tick C:

//  If a header file is included within <>, the preprocessor will search a predetermined directory path to locate the header file. If the header file is enclosed in "", the preprocessor will look for the header file in the same directory as the source file.
#include <stdio.h>
#include "stdio.h"

Example from PHP:

<?php
include 'vars.php';
require 'filename'; // FATAL error if fails

Example from Perl:

use Digest::MD5 'md5_hex';

Example from Ruby:

load 'filename.rb'
require 'filename'
require 'trig.rb'

Example from MATLAB:

import pkg.cls1
import pkg.pkfcn

Example from C#:

using static System.Console;
using static System.Math;
class Program
{
    static void Main()
    {
        WriteLine(Sqrt(3*3 + 4*4));
    }
}

Example from R:

source("filename.r")

Example from Go:

import (
   "fmt"
   "math"
)
import . "fmt"
import _ "io"
import log "github.com/foo/bar"
import m "math"

Example from CSS:

@import 'custom.css';

Example from Swift:

import UIKit
import UIKit.UITableViewController
let tvc = UITableViewController()
let vc = UIViewController()
let label = UILabel()

Example from Rust:

use ::std::fs;  // Imports from the `std` crate, not the module below.
use self::std::fs as self_fs;  // Imports the module below.
mod my;
use self::foo::Zoo as _;
#[path = "foo.rs"]
mod c;

Example from Kotlin:

import foo.Bar // Bar is now accessible without qualification
import foo.* // everything in 'foo' becomes accessible
import bar.Bar as bBar // bBar stands for 'bar.Bar'

Example from Haskell:

import Data.Maybe
import Mod as Foo
import Mod (x,y, (+++))
import qualified Mod
import Mod hiding (x,y,(+++))
import qualified Mod hiding (x,y)

Example from TypeScript, Static Typescript:

import { ZipCodeValidator } from "./ZipCodeValidator";
/// <reference path="../typings/jquery.d.ts"/>
/// <reference path="components/someclass.ts"/>
import moo = module('moo');
/// <amd-dependency path="legacy/moduleA" name="moduleA"/>

Example from Julia:

# Files and file names are mostly unrelated to modules; modules are associated only with module expressions.
# One can have multiple files per module, and multiple modules per file:
using MyModule
using MyModule: x, p
import MyModule
import MyModule.x, MyModule.p
import MyModule: x, p
module Foo
include("file1.jl")
include("file2.jl")
end

Example from Clojure:

(load "fun")
(load "files/fun")
(load-file "./files/fun.clj")
(defproject project-a
:dependencies [[org.clojure/clojure "1.5.1"]
              [project-b "0.1.0"]])
(require '[clojure.string :as string])
(use '[clojure.string :only [split]])
(import 'java.util.Date)
(java.util.Date.)
(require 'clojure.contrib.def 'clojure.contrib.except 'clojure.contrib.sql)
(require '(clojure.contrib def except sql))

Example from Bash:

source ./bash.sh

Example from Node.js:

const jtree = require("jtree")

Example from Objective-C, cooC:

// #import ensures that a file is only ever included once so that you never have a problem with recursive includes.
#import <Foundation/Foundation.h>
#include <asl.h>
#include <mach/mach.h>

Example from Elixir:

# Alias the module so it can be called as Bar instead of Foo.Bar
alias Foo.Bar, as: Bar

# Require the module in order to use its macros
require Foo

# Import functions from Foo so they can be called without the `Foo.` prefix
import Foo

# Invokes the custom code defined in Foo as an extension point
use Foo

Example from Erlang:

-include("my_records.hrl").
-include("incdir/my_records.hrl").
-include("/home/user/proj/my_records.hrl").
-include("$PROJ_ROOT/my_records.hrl").
-include_lib("kernel/include/file.hrl").

Example from Dart:

import 'file-system.dart';
import 'dart:math' as math;

Example from Crystal:

require "../../spec_helper"

Example from F#:

open module-or-namespace-name
open System.IO
open List
open Seq

Example from Racket:

(require (prefix-in tcp: racket/tcp))

Example from Pug:

//- index.pug
doctype html
html
  include includes/head.pug
  body
    h1 My Site
    p Welcome to my super lame site.
    include includes/foot.pug

Example from Ballerina:

import ballerina/http;
import ballerina/io;

Example from X10:

import x10.io.Console;

Example from C3:

import std::io;

Example from Speedie:

import Proj

Example from Xtext:

import "http://www.xtext.org/example/Domainmodel"
import "http://www.xtext.org/example/Domainmodel" as dmodel

Example from Slope:

(load-mod my-module)
(load "examples/test.slo")

Example from Jule:

use std::fs
use std::sys::{self, open, O_RDWR}
use std::math::*

Example from Flow9:

import runtime;

Example from bog:

let {print} = import "std.io"

Example from Cyber:

import m 'math'

Example from Scroll:

import settings.scroll

Languages with File Imports include Java, JavaScript, Python, C, C++, PHP, Perl, Ruby, MATLAB, C#, R, Go, CSS, Swift, Rust, Kotlin, Haskell, TypeScript, Julia, Clojure, Bash, Node.js, Objective-C, Elixir, Erlang, Dart, Crystal, F#, Racket, Pug, Ballerina, X10, Cython, C3, Speedie, Xtext, progsbase, Slope, Jule, Pizza, Flow9, bog, Cyber, Scroll, Dale, Oracle Java, Deesel, Tick C, cooC, Static Typescript

Languages without File Imports include HTML, JSON, JSON5, Ion, JSONiq, JSON with Comments, Superjson, Jsonnet, Hocon

This question asks: Does this language have a syntax for importing other files?

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