What is delphi?

Delphi is a programming language and an integrated development environment (IDE) created by Embarcadero. It uses the Object Pascal language, which is a modern, easy‑to‑read version of the classic Pascal language. With Delphi you can write applications for Windows, macOS, iOS, Android, and Linux, all from a single code base.

Let's break it down

  • Object Pascal: The language syntax looks like English sentences, making it beginner‑friendly. It supports object‑oriented concepts like classes and inheritance.
  • IDE: Delphi’s IDE includes a visual form designer, code editor, debugger, and tools for building user interfaces without writing all the code by hand.
  • Cross‑platform: Write once, compile for many operating systems.
  • VCL / FMX: Two main UI frameworks - VCL for classic Windows apps, FMX (FireMonkey) for modern, cross‑platform GUIs.
  • Component library: Thousands of ready‑made components (buttons, grids, charts, etc.) that you can drop onto a form and configure.

Why does it matter?

Delphi lets developers create fast, native applications with a single code base, saving time and money. Its compiled code runs directly on the CPU, so programs are usually faster and use less memory than interpreted languages. Because the language is clear and the IDE visual, newcomers can build functional apps quickly, while experienced programmers can still write complex, high‑performance software.

Where is it used?

  • Desktop business applications (accounting, inventory, CRM) for Windows and macOS.
  • Mobile apps for iOS and Android, especially in industries that need a single code base.
  • Embedded and IoT devices using the Linux compiler.
  • Legacy systems that were originally built in Delphi and are still maintained.
  • Educational settings where teaching structured, object‑oriented programming is needed.

Good things about it

  • Rapid development: Drag‑and‑drop UI design speeds up prototyping.
  • Strong performance: Native compiled binaries run quickly.
  • Cross‑platform: One project can target many OSes.
  • Large component ecosystem: Many third‑party libraries and controls are available.
  • Stable language: Object Pascal has changed little, so code written years ago still compiles today.
  • Good backward compatibility: Older Delphi code often works with newer versions.

Not-so-good things

  • Smaller community: Compared to C#, Java, or JavaScript, fewer developers use Delphi, so finding help or tutorials can be harder.
  • Licensing cost: The professional IDE requires a paid license; the free Community Edition has limitations.
  • Limited web development: Delphi is strong for desktop/mobile but not a primary choice for modern web apps.
  • Perception: Some view Delphi as “old‑school,” which can affect hiring or project acceptance.
  • Platform quirks: While cross‑platform, certain UI components behave differently on each OS, requiring extra testing.