BroadOakData.UK

Hello world in different computer languages

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by

broadoakdata
in ,

We will write Hello world in different computer languages:

  • PHP
  • Python
  • C
  • Java

Hello world in different computer languages will be implemented using Termux Linux emulator on an android smart phone.

PHP

PHP is server side programing language. There are many well known applications have been written using PHP such Meta’s Facebook, WordPress, Drupal, SugarCRM, Joomla, etc. Very popular language for Web development.

Check out the version of PHP on your device.

~ $ pkg show php
Package: php
Version: 8.1.3-2
Maintainer: @termux
Installed-Size: 52.6 MB
Depends: freetype, libandroid-glob, libandroid-support, libbz2, libcrypt, libcurl, libgd, libgmp, libiconv, liblzma, libresolv-wrapper, libsqlite, libxml2, libxslt, libzip, oniguruma, openssl, pcre2, readline, zlib, libicu, libffi, tidy, zstd
Conflicts: php-mysql, php-dev
Replaces: php-mysql, php-dev
Homepage: https://php.net
Download-Size: 8450 kB
APT-Manual-Installed: yes
APT-Sources: https://dl.kcubeterm.com/termux-main stable/main aarch64 Packages
Description: Server-side, HTML-embedded scripting language

Hello world in PHP language

<?php
echo "Hello world\n";
?>

You do not need to compile PHP or Python program. Just run it from the command line.

PHP code must start with <?php tag and end with ?>

~ $ php hello.php
Hello world
~ $

Hello world in Python language

print("Hello world")

Save your file with suffix .py. Run using python hello.py

~ $ python hello.py
Hello wirld
~ $ more hello.py
print("Hello world")
~ $

Check python on your device

~ $ pkg show python
Package: python
Version: 3.10.4
Maintainer: @termux
Installed-Size: 50.0 MB
Provides: python3
Depends: gdbm, libandroid-posix-semaphore, libandroid-support, libbz2, libcrypt, libexpat, libffi, liblzma, libsqlite, ncurses, ncurses-ui-libs, openssl, readline, zlib
Recommends: clang, make, pkg-config
Suggests: python-tkinter
Breaks: python2 (<= 2.7.15), python-dev
Replaces: python-dev
Homepage: https://python.org/
Download-Size: 8948 kB
APT-Manual-Installed: yes
APT-Sources: https://dl.kcubeterm.com/termux-main stable/main aarch64 Packages
Description: Python 3 programming language intended to enable clear programs
~ $ python
Python 3.10.4 (main, Mar 25 2022, 15:08:58) [Clang 12.0.8 (https://android.googlesource.com/toolchain/llvm-project c935d99d7 on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> exit
Use exit() or Ctrl-D (i.e. EOF) to exit

Hello world in C language

C language is a general purpose system programming language and it’s one of the oldest programming language. You have compile your codes using a compiler and create executable binary file to run the program.

See implementation of checking if number is a prime or not at https://broadoakdata.uk/hello-c-termux/

~ $ more hello.c                   #include <stdio.h>                 int main(){                          printf("Hello world\n");           return 0;                        }
~ $ gcc hello.c -o hello
~ $ ./hello
Hello world

Hello world in Java language

Java is an object oriented language by design. You also need to compile your code into byte codes using Java compiler. The bytes codes will sun on any systems which support Java.

~ $ more hello.java                class hello{
    public static void main(String args[]){       System.out.println("Hello Java");                                    }                              }
~ $ javac hello.java
~ $ java hello
Hello Java